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 A294955 a(n) = Sum_{d|n} d^(2*n+2). 3
 1, 65, 6562, 1049601, 244140626, 78368963450, 33232930569602, 18014467229220865, 12157665462543713203, 10000002384185795209930, 9849732675807611094711842, 11447546167874515876354097130, 15502932802662396215269535105522 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Seiichi Manyama, Table of n, a(n) for n = 1..213 FORMULA G.f.: Sum_{k>0} k^(2*k+2)*x^k/(1-(k^2*x)^k). PROG (PARI) {a(n) = sigma(n, 2*n+2)} (PARI) N=20; x='x+O('x^N); Vec(sum(k=1, N, k^(2*k+2)*x^k/(1-(k^2*x)^k))) CROSSREFS Cf. A294645, A294810, A294953, A294954. Sequence in context: A084272 A146756 A202386 * A115432 A116104 A116121 Adjacent sequences:  A294952 A294953 A294954 * A294956 A294957 A294958 KEYWORD nonn AUTHOR Seiichi Manyama, Nov 12 2017 STATUS approved

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Last modified April 21 17:29 EDT 2021. Contains 343156 sequences. (Running on oeis4.)