A319363 a(n) = [x^n] exp(Sum_{k>=1} sigma(k^n)*x^k/k).
1, 1, 4, 21, 296, 5677, 291348, 22679763, 3946629792, 1281287791090, 840017139222515, 1068253745514088673, 2745322115165570881474, 14006438682727577999625359, 141884380264686466724199980066, 2897075017978846591982107951045864, 118770312781918226439371316982748736112
Offset: 0
Keywords
Links
- Seiichi Manyama, Table of n, a(n) for n = 0..80
Programs
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Mathematica
Table[SeriesCoefficient[Exp[Sum[DivisorSigma[1, k^n] x^k/k, {k, 1, n}]], {x, 0, n}], {n, 0, 16}]