A374707 Number of distinct sums i^3 + j^3 for 0<=i<=j<=n.

1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 90, 104, 119, 135, 151, 169, 188, 208, 229, 251, 274, 298, 322, 348, 375, 402, 431, 461, 492, 524, 556, 590, 623, 659, 695, 733, 772, 811, 851, 893, 936, 980, 1025, 1071, 1118, 1166, 1213, 1263, 1314, 1365, 1418, 1471, 1525, 1580, 1637, 1695, 1753

Offset

0,2

Links

Seiichi Manyama, Table of n, a(n) for n = 0..1000

Prog

(PARI) a(n) = my(v=vector(2*n^3+1)); for(i=0, n, for(j=i, n, v[i^3+j^3+1]+=1)); sum(i=1, #v, v[i]>0);

Crossrefs

Cf. A374710, A374711.

Cf. A047800, A061791.

Sequence in context: A033444 A061791 A268291 * A105336 A130910 A105337

Adjacent sequences: A374704 A374705 A374706 * A374708 A374709 A374710

Keyword

nonn

Author

Seiichi Manyama, Jul 17 2024

Status

approved