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 A371311 #26 Mar 24 2024 09:55:21
%S A371311 1,1,4,21,52,465,3306,14161,74208,960777,10558630,44851521,361716576,
%T A371311 2473446157,46951741760,735722365995,3502764883456,27660533205537,
%U A371311 257573937401838,2415069153393553,62591287234200960,1356650271603527061,6966660193683272104,61046400429116180475
%N A371311 Expansion of e.g.f. Product_{k>=1} (1 + k*x^k/(k-1)!).
%C A371311 "EFJ" (unordered, size, labeled) transform of squares.
%H A371311 C. G. Bower, <a href="/transforms2.html">Transforms (2)</a>
%t A371311 nmax = 23; CoefficientList[Series[Product[(1 + k x^k/(k - 1)!), {k, 1, nmax}], {x, 0, nmax}], x] Range[0, nmax]!
%Y A371311 Cf. A000290, A007837, A032299, A032300, A092484.
%K A371311 nonn
%O A371311 0,3
%A A371311 _Ilya Gutkovskiy_, Mar 24 2024