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A104054 Numbers which are the sum of three positive cubes and divisible by 31. 1
62, 155, 434, 496, 713, 775, 1054, 1240, 1333, 1457, 1581, 1674, 2232, 2325, 2604, 2883, 3224, 3410, 3472, 3503, 3689, 3782, 3968, 4061, 4185, 4402, 4929, 5394, 5580, 5704, 5921, 6200, 6572, 6758, 6913, 7750, 8091, 8370, 8432, 8494, 9083, 9827, 9920 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000

EXAMPLE

a(1)=62 because 62=2^3+3^3+3^3.

a(2)=155 because 155=3^3+4^3+4^3.

a(3)=434 because 434=3^3+4^3+7^3......

MATHEMATICA

cbQ[n_]:=Module[{prs=Select[PowersRepresentations[n, 3, 3], First[#]>0&]}, Length[ prs]>0]; Select[31Range[320], cbQ] (* Harvey P. Dale, Jul 27 2011 *)

CROSSREFS

Cf. A003072.

Sequence in context: A044694 A238138 A332312 * A255153 A044394 A044775

Adjacent sequences:  A104051 A104052 A104053 * A104055 A104056 A104057

KEYWORD

nonn

AUTHOR

Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Mar 02 2005

STATUS

approved

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Last modified May 8 09:57 EDT 2021. Contains 343666 sequences. (Running on oeis4.)