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 A094637 #9 Feb 02 2021 19:33:28 %S A094637 1,1,1,4,16,103,799,7286,71094,729974,7743818,84307887,937002302, %T A094637 10595117272,121568251909,1412555701804,16594126114458, %U A094637 196829590326284,2354703777373055,28385225424840078,344524656398655124,4207569734885041198,51674558137433627724 %N A094637 Number of unlabeled hexagonal 2-trees with n hexagons. %H A094637 Andrew Howroyd, <a href="/A094637/b094637.txt">Table of n, a(n) for n = 0..200</a> %H A094637 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>, arXiv:math/0312424 [math.CO], Dec 23 2003. %Y A094637 Column k=6 of A340811. %Y A094637 Cf. A054581. %K A094637 nonn %O A094637 0,4 %A A094637 _Vladeta Jovovic_, Jun 06 2004 %E A094637 Terms a(21) and beyond from _Andrew Howroyd_, Feb 02 2021