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 A346188 #4 Jul 10 2021 03:04:44
%S A346188 1,1,3,10,47,236,1482,10375,83351,750412,7506488,82571369,990876614,
%T A346188 12881395983,180339682057,2705095261250,43281525456071,
%U A346188 735785932753208,13244146802607336,251638789249539385,5032775785133933492,105688291487814923233,2325142412733663015287
%N A346188 a(1) = 1; a(n+1) = Sum_{d|n} binomial(n,d) * a(n/d).
%t A346188 a[1] = 1; a[n_] := a[n] = Sum[Binomial[n - 1, d] a[(n - 1)/d], {d, Divisors[n - 1]}]; Table[a[n], {n, 1, 23}]
%Y A346188 Cf. A000110, A003238, A056045, A330017, A345136.
%K A346188 nonn
%O A346188 1,3
%A A346188 _Ilya Gutkovskiy_, Jul 09 2021