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A320194
Number of integer solutions to a^2 + 2*b^2 + 4*c^2 + 5*d^2 = n.
11
1, 2, 2, 4, 4, 6, 12, 12, 14, 14, 16, 20, 24, 24, 12, 24, 20, 24, 34, 12, 26, 36, 44, 36, 40, 38, 40, 80, 44, 32, 44, 40, 54, 72, 24, 24, 68, 48, 76, 64, 56, 48, 104, 84, 40, 98, 36, 84, 104, 50, 58, 56, 84, 104, 112, 76, 48, 120, 120, 92, 128, 60, 80, 132, 76, 96
OFFSET
0,2
COMMENTS
a(n) > 0 for n >= 0.
LINKS
FORMULA
G.f.: theta_3(q) * theta_3(q^2) * theta_3(q^4) * theta_3(q^5).
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Oct 07 2018
STATUS
approved