A047717 Numbers that are the sum of 6 but no fewer nonzero fourth powers.

6, 21, 36, 51, 66, 86, 96, 101, 116, 131, 146, 161, 166, 181, 196, 211, 226, 246, 261, 276, 291, 306, 321, 326, 336, 341, 356, 371, 386, 401, 406, 421, 436, 451, 466, 486, 501, 516, 531, 546, 561, 576, 581, 596, 611, 630, 645, 660, 661, 676, 691, 705, 710

Offset

1,1

Links

David A. Corneth, Table of n, a(n) for n = 1..26675 (terms <= 200000)

Prog

(PARI) upto(n)={my(e=6); my(s=sum(k=1, sqrtint(sqrtint(n)), x^(k^4)) + O(x*x^n)); my(p=s^e, q=(1 + s)^(e-1)); select(k->polcoeff(p, k) && !polcoeff(q, k), [1..n])} \\ Andrew Howroyd, Jul 06 2018

Crossrefs

Cf. A000583, A002377, A003340.

Sequence in context: A003340 A345813 A139606 * A089982 A151943 A207339

Adjacent sequences: A047714 A047715 A047716 * A047718 A047719 A047720

Keyword

nonn

Author

Arlin Anderson (starship1(AT)gmail.com)

Status

approved