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 A377556 #3 Nov 01 2024 07:14:09
%S A377556 1,1,5,19,193,1181,13021,117895,1868609,20980153,348219541,4940639771,
%T A377556 98898110785,1632238421269,34910480911853,672959412044431,
%U A377556 16733065940227201,359936040496423025,9469928134781142949,229631546862609396643,6716832478519734558401,178344294076141938008461
%N A377556 E.g.f.: exp(Sum_{n>=1} A006519(n) * x^n).
%t A377556 nmax = 25; CoefficientList[Series[Exp[Sum[2^IntegerExponent[k, 2]*x^k, {k, 1, nmax}]], {x, 0, nmax}], x] * Range[0,nmax]!
%Y A377556 Cf. A000123, A006519, A038500, A161809, A377555.
%K A377556 nonn
%O A377556 0,3
%A A377556 _Vaclav Kotesovec_, Nov 01 2024