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 A320147 Number of integer solutions to a^2 + b^2 + 3*c^2 + 5*d^2 = n. 5
 1, 4, 4, 2, 12, 18, 8, 16, 24, 28, 40, 8, 26, 72, 16, 16, 44, 44, 68, 24, 34, 80, 72, 28, 40, 124, 40, 50, 112, 56, 80, 40, 76, 144, 120, 32, 84, 216, 24, 40, 136, 80, 160, 88, 56, 154, 88, 28, 158, 228, 100, 48, 216, 172, 80, 104, 80, 300, 280, 40, 112, 248, 120, 112 (list; graph; refs; listen; history; text; internal format)
 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)^2 * theta_3(q^3) * theta_3(q^5). CROSSREFS Cf. A034896, A272364, A320148. Sequence in context: A224821 A034933 A320148 * A272364 A188657 A021697 Adjacent sequences:  A320144 A320145 A320146 * A320148 A320149 A320150 KEYWORD nonn AUTHOR Seiichi Manyama, Oct 06 2018 STATUS approved

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Last modified April 7 04:20 EDT 2020. Contains 333292 sequences. (Running on oeis4.)