A055430 Number of points in Z^n of norm <= 6.

1, 13, 113, 925, 6577, 42205, 252673, 1405325, 7259297, 35372141, 164379601, 733618493, 3146718929, 12990499005, 51718535393, 198914813101, 740760081985, 2678069599181, 9420136888369, 32289213758941

Offset

0,2

Links

Andrew Howroyd, Table of n, a(n) for n = 0..1000

Mathematica

a[n_] := SeriesCoefficient[1/(1-x) Sum[x^(i^2), {i, -6, 6}]^n, {x, 0, 36}];
a /@ Range[0, 19] (* Jean-François Alcover, Sep 29 2019, from A302997 *)

Crossrefs

Row n=6 of A302997.

Sequence in context: A125376 A048545 A164609 * A126534 A361915 A340844

Adjacent sequences: A055427 A055428 A055429 * A055431 A055432 A055433

Keyword

nonn

Author

David W. Wilson

Status

approved