A280452 - OEIS

A280452

G.f.: Product_{k>=1, j>=1} (1 + x^(j^2*k^2)).

1, 1, 0, 0, 2, 2, 0, 0, 1, 3, 2, 0, 0, 4, 4, 0, 3, 5, 3, 1, 6, 6, 2, 2, 3, 11, 9, 1, 0, 16, 16, 0, 3, 11, 15, 7, 10, 10, 14, 14, 11, 23, 19, 9, 6, 36, 32, 4, 5, 31, 46, 18, 16, 26, 48, 36, 25, 35, 38, 36, 20, 60, 60, 28, 20, 82, 98, 30, 31, 65, 104, 64, 40

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OFFSET

0,5

LINKS

Vaclav Kotesovec, Table of n, a(n) for n = 0..10000

MATHEMATICA

nmax = 100; CoefficientList[Series[Product[(1 + x^(j^2*k^2)), {k, 1, Floor[Sqrt[nmax]]+1}, {j, 1, Floor[Sqrt[nmax/k^2]] + 1}], {x, 0, nmax}], x]

CROSSREFS

Cf. A107742, A280451, A280453.

Sequence in context: A225927 A029392 A035379 * A096587 A136438 A370063

Adjacent sequences: A280449 A280450 A280451 * A280453 A280454 A280455

KEYWORD

nonn

AUTHOR

Vaclav Kotesovec, Jan 03 2017

STATUS

approved