This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A294460 #14 Oct 31 2017 13:32:51 %S A294460 1,-1,-1,-19,73,-401,5191,-29779,879089,-7232833,103048111, %T A294460 -1891058291,31696845049,-649348332049,9310670445623,-270217657103731, %U A294460 5480877008565601,-131578355696804609,3133521575795986399,-81890613282163881043,2460096066325021029161 %N A294460 E.g.f.: exp(-Sum_{n>=1} A000593(n) * x^n). %H A294460 Seiichi Manyama, <a href="/A294460/b294460.txt">Table of n, a(n) for n = 0..437</a> %F A294460 a(0) = 1 and a(n) = (-1) * (n-1)! * Sum_{k=1..n} k*A000593(k)*a(n-k)/(n-k)! for n > 0. %o A294460 (PARI) N=66; x='x+O('x^N); Vec(serlaplace(exp(-sum(k=1, N, sumdiv(k, d, d*(d%2))*x^k)))) %Y A294460 E.g.f.: exp(-Sum_{n>=1} (Sum_{d|n and d is odd} d^k) * x^n): A294459 (k=0), this sequence (k=1), A294461 (k=2). %Y A294460 Cf. A000593, A081362, A294394. %K A294460 sign %O A294460 0,4 %A A294460 _Seiichi Manyama_, Oct 31 2017