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A294388 a(n) = n! * [x^n] exp(Sum_{k=1..n} sigma_n(k) * x^k). 2

%I

%S 1,1,11,223,12193,1548841,501460531,355752425239,558112176198305,

%T 2023318561014654769,15928875457207423721731,

%U 268023268481704204728199711,10084410400965244525857478169665,817174553170437003290060071895273113

%N a(n) = n! * [x^n] exp(Sum_{k=1..n} sigma_n(k) * x^k).

%H Seiichi Manyama, <a href="/A294388/b294388.txt">Table of n, a(n) for n = 0..75</a>

%Y Main diagonal of A294296.

%Y Cf. A252782.

%K nonn

%O 0,3

%A _Seiichi Manyama_, Oct 30 2017

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Last modified September 21 12:03 EDT 2019. Contains 327253 sequences. (Running on oeis4.)