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 A094611 #12 May 09 2021 18:43:50 %S A094611 1,1,1,3,11,56,359,2597,20386,167819,1429815,12500748,111595289, %T A094611 1013544057,9340950309,87176935700,822559721606,7836316493485, %U A094611 75293711520236,728968295958626,7105984356424859,69697524828651997,687448151462822966,6815174949649428254 %N A094611 Number of unlabeled pentagonal 2-trees with n pentagons. %H A094611 Andrew Howroyd, <a href="/A094611/b094611.txt">Table of n, a(n) for n = 0..200</a> %H A094611 G. Labelle, C. Lamathe and P. Leroux, <a href="http://arXiv.org/abs/math.CO/0312424">Labeled and unlabeled enumeration of k-gonal 2-trees</a> %Y A094611 Column k=5 of A340811. %Y A094611 Cf. A054581. %K A094611 nonn %O A094611 0,4 %A A094611 _Vladeta Jovovic_, Jun 06 2004 %E A094611 Terms a(21) and beyond from _Andrew Howroyd_, May 09 2021