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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
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
KEYWORD
nonn
AUTHOR
Arlin Anderson (starship1(AT)gmail.com)
STATUS
approved