A004875 Numbers that are the sum of at most 2 nonzero 8th powers.

0, 1, 2, 256, 257, 512, 6561, 6562, 6817, 13122, 65536, 65537, 65792, 72097, 131072, 390625, 390626, 390881, 397186, 456161, 781250, 1679616, 1679617, 1679872, 1686177, 1745152, 2070241, 3359232, 5764801, 5764802, 5765057, 5771362, 5830337

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 1..10000

Programs

PARI

list(lim)=my(v=List(),x8); for(x=0,sqrtnint(lim\=1,8), x8=x^8; for(y=0,min(sqrtnint(lim-x8,8),x), listput(v, x8+y^8))); Set(v) \\ Charles R Greathouse IV, Aug 22 2017

PARI

T=thueinit('z^8+1,1);
is(n)=#thue(T,n)>0 \\ Charles R Greathouse IV, Aug 23 2017