A327215 Self-convolution of A008485.

1, 2, 11, 54, 279, 1442, 7530, 39474, 207693, 1095522, 5790116, 30650038, 162451560, 861920492, 4577055823, 24323292984, 129338944225, 688128700422, 3662798123481, 19504467792378, 103899170100154, 553642311668244, 2951010332435759, 15733439067954134

Offset

0,2

Links

Vaclav Kotesovec, Table of n, a(n) for n = 0..1000

Formula

a(n) ~ c^2 * Pi * d^n, where d = A270915 = 5.352701333486642687772415814165... and c = A327279 = 0.26801521271073331568695383828... (see A008485).

Mathematica

A008485[n_]:=SeriesCoefficient[Product[1/(1-x^k)^n, {k, 1, n}], {x, 0, n}];
Table[Sum[A008485[k]*A008485[n-k], {k, 0, n}], {n, 0, 25}]

Crossrefs

Cf. A000712, A008485, A304444, A309986, A327214.

Sequence in context: A291386 A128748 A251662 * A307444 A037522 A037731

Adjacent sequences: A327212 A327213 A327214 * A327216 A327217 A327218

Keyword

nonn

Author

Vaclav Kotesovec, Aug 26 2019

Status

approved