Category: Uncategorized

  • 10⁴

    Marking that I unlocked a new order of magnitude in number of days alive.

    Maybe I’ll write more on this page later.

  • Natural Numbers Between 1 and 100, Represented as Sum of Three Cubes

    It came to me as a shock that the first page of Google failed me when I wanted to show the following information at a party, so I wanted to post my own list.

    It is compiled from Internet News Articles, and Wikipedia.

    Note that in the case of a non-unique solution, preferably, the result with the smallest biggest term was taken. This claim is yet to be fully verified.

    1 = (-1)³ + 1³ + 1³

    2 = 7³ + (-5)³ + (-6)³

    3 = 1³ + 1³ + 1³

    6 = (-1)³ + (-1)³ + 2³

    7 = 104³ + 32³ + (-105)³

    8 = (-1)³ + 1³ + 2³

    9 = 217³ + (-52)³ + (-216)³

    10 = 1³ + 1³ + 2³

    11 = (-2)³ + (-2)³ + 3³

    12 = 7³ + 10³ + (-11)³

    15 = (-1)³ + 2³ + 2³

    16 = (-511)³ + (-1609)³ + 1626³

    17 = 1³ + 2³ + 2³

    18 = (-1)³ + (-2)³ + 3³

    19 = 19³ + (-14)³ + (-16)³

    20 = 1³ + (-2)³ + 3³

    21 = (-11)³ + (-14)³ + 16³

    24 = 2³ + 2³ + 2³

    25 = (-1)³ + (-1)³ + 3³

    26 = 297³ + 161³ + (-312)³

    27 = (-1)³ + 1³ + 3³

    28 = 14³ + 13³ + (-17)³

    29 = 1³ + 1³ + 3³

    30 = (-283059965)³ + (-2218888517)³ + 2220422932³

    33 = 8866128975287528³ + (-8778405442862239)³ + (-2736111468807040)³

    34 = (-1)³ + 2³ + 3³

    35 = 14³ + (-8)³ + (-13)³

    36 = 1³ + 2³ + 3³

    37 = 50³ + 37³ + (-56)³

    38 = 1³ + (-3)³ + 4³

    39 = 117367³ + 134476³ + (-159380)³

    42 = (-80538738812075974)³ + 80435758145817515³ + 12602123297335631³

    43 = 2³ + 2³ + 3³

    44 = (-5)³ + (-7)³ + 8³

    45 = 2³ + (-3)³ + 4³

    46 = (-2)³ + 3³ + 3³

    47 = 6³ + 7³ + (-8)³

    48 = (-23)³ + (-26)³ + 31³

    51 = 602³ + 659³ + (-796)³

    52 = 23961292454³ + 60702901317³ + (-61922712865)³

    53 = (-1)³ + 3³ + 3³

    54 = (-7)³ + (-11)³ + 12³

    55 = 1³ + 3³ + 3³

    56 = (-11)³ + (-21)³ + 22³

    57 = 1³ + (-2)³ + 4³

    60 = (-1)³ + (-4)³ + 5³

    61 = 845³ + 668³ + (-966)³

    62 = 3³ + 3³ + 2³

    63 = 7³ + (-4)³ + (-6)³

    64 = (-1)³ + 1³ + 4³

    65 = 91³ + 85³ + (-111)³

    66 = 1³ + 1³ + 4³

    69 = 2³ + (-4)³ + 5³

    70 = 11³ + 20³ + (-21)³

    71 = (-1)³ + 2³ + 4³

    72 = 7³ + 9³ + (-10)³

    73 = 1³ + 2³ + 4³

    74 = (-284650292555885)³ + (66229832190556)³ + (283450105697727)³

    75 = 4381159³ + 435203083³ + (-435203231)³

    78 = 26³ + 53³ + (-55)³

    79 = (-19)³ + (-33)³ + 35³

    80 = 69241³ + 103532³ + (-112969)³

    81 = 3³ + 3³ + 3³

    82 = (-11)³ + (-11)³ + 14³

    83 = (-2)³ + 3³ + 4³

    84 = (-8241191)³ + (-41531726)³ + 41639611³

    87 = (-1972)³ + (-4126)³ + 4271³

    88 = 3³ + (-4)³ + 5³

    89 = 6³ + 6³ + (-7)³

    90 = (-1)³ + 3³ + 4³

    91 = 364³ + 192³ + (-381)³

    92 = 1³ + 3³ + 4³

    93 = (-5)³ + (-5)³ + 7³

    96 = 10853³ + 13139³ + (-15250)³

    97 = (-1)³ + (-3)³ + 5³

    98 = 14³ + 9³ + (-15)³

    99 = 2³ + 3³ + 4³

    100 = 7³ + (-3)³ + (-6)³

    Numbers that are 4 or 5 (mod 9) cannot be written as three cubes because all natural numbers’ cubes can only be 0, 1 or 8 (mod 9), and with three of them we cannot make a 4 nor a 5.

    EDIT:

    I think that because I’ve opted out of AMP and Ad services on this site, I still won’t make it to first page of Google, even when searching the exact title of this page.