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A055406
Number of points in N^7 of norm <= n.
6
1, 8, 106, 702, 3390, 11496, 33792, 83877, 191433, 394251, 766518, 1397065, 2446316, 4076126, 6601783, 10324698, 15776495, 23436651, 34198045, 48828417, 68680634, 94868383, 129404333, 173984393, 231540046, 304058667, 395837165
OFFSET
0,2
LINKS
FORMULA
a(n) = [x^(n^2)] (1 + theta_3(x))^7/(128*(1 - x)), where theta_3() is the Jacobi theta function. - Ilya Gutkovskiy, Apr 15 2018
CROSSREFS
Column k=7 of A302998.
Sequence in context: A113551 A082735 A024358 * A155632 A129278 A369512
KEYWORD
nonn
STATUS
approved