A320140 - OEIS

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A320140

Number of integer solutions to a^2 + 2*b^2 + 3*c^2 + 5*d^2 = n.

1, 2, 2, 6, 6, 6, 16, 8, 14, 26, 8, 32, 26, 8, 40, 16, 22, 40, 22, 32, 46, 40, 24, 48, 40, 42, 72, 50, 32, 64, 56, 28, 74, 48, 60, 112, 78, 24, 72, 76, 40, 144, 48, 48, 120, 50, 52, 48, 70, 98, 150, 128, 40, 84, 128, 52, 176, 120, 56, 208, 96, 72, 92, 72, 102, 192, 156

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OFFSET

0,2

COMMENTS

a(n) > 0 for n >= 0.

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..10000

FORMULA

G.f.: theta_3(q) * theta_3(q^2) * theta_3(q^3) * theta_3(q^5).

CROSSREFS

Cf. A320138, A320139, A033712, A320188, A320189, A320190, A320191.

Sequence in context: A084700 A122766 A291185 * A033742 A358624 A048594

Adjacent sequences: A320137 A320138 A320139 * A320141 A320142 A320143

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Oct 06 2018

STATUS

approved