A047719 Numbers that are the sum of 8 but no fewer nonzero fourth powers.

8, 23, 38, 53, 68, 88, 103, 118, 128, 133, 148, 168, 183, 193, 198, 213, 228, 248, 263, 278, 293, 308, 323, 328, 343, 358, 368, 373, 388, 403, 408, 423, 433, 438, 453, 468, 483, 488, 498, 503, 518, 533, 548, 563, 568, 578, 583, 598, 608, 613, 632, 647, 648

Offset

1,1

Links

David A. Corneth, Table of n, a(n) for n = 1..20516 (terms <= 200000)

Prog

(PARI) upto(n)={my(e=8); 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, A018889, A003342.

Sequence in context: A003342 A345833 A164284 * A164131 A212458 A114381

Adjacent sequences: A047716 A047717 A047718 * A047720 A047721 A047722

Keyword

nonn

Author

Arlin Anderson (starship1(AT)gmail.com)

Status

approved