A055434 Number of points in Z^n of norm <= 10.

1, 21, 317, 4169, 49689, 532509, 5260181, 48218513, 415055025, 3375505573, 26107328109, 193280122713, 1374386800585, 9405092131245, 62077194367429, 396122100447649, 2449318034512737, 14705097001902901, 85877415063465373

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, -10, 10}]^n, {x, 0, 100}];
a /@ Range[0, 18] (* Jean-François Alcover, Sep 29 2019, from A302997 *)

Crossrefs

Row n=10 of A302997.

Sequence in context: A021214 A016318 A017954 * A016315 A113531 A069572

Adjacent sequences: A055431 A055432 A055433 * A055435 A055436 A055437

Keyword

nonn

Author

David W. Wilson

Status

approved