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A047717 Numbers that are the sum of 6 but no fewer nonzero fourth powers. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A115702 A003340 A139606 * A089982 A151943 A207339

Adjacent sequences:  A047714 A047715 A047716 * A047718 A047719 A047720

KEYWORD

nonn

AUTHOR

Arlin Anderson (starship1(AT)gmail.com)

STATUS

approved

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Last modified July 22 20:51 EDT 2019. Contains 325226 sequences. (Running on oeis4.)