Expansion of e.g.f. Product_{k>=1} (1 + x^k)^(sigma(k)/k), where sigma(k) is the sum of the divisors of k.

A318769

Expansion of e.g.f. Product_{k>=1} (1 + x^k)^(sigma(k)/k), where sigma(k) is the sum of the divisors of k.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =17a(4) =83a(5) =639a(6) =5749a(7) =53227a(8) =561273a(9) =7216577a(10) =94292531a(11) =1352253561a(12) =21657812923a(13) =359338829407

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