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 A054749 #11 Feb 21 2022 15:47:52 %S A054749 1,5,23,165,1328,13193,145076,1774515,23600723,338704176,5202002092, %T A054749 85007211518,1470699469052,26828468813710,514213843983674, %U A054749 10323889080831256,216536421271101354,4733415248988274281,107609706100197846274,2539397701858619916499 %N A054749 Number of inequivalent connected n-state 1-input n-output automata. %C A054749 Inverse Euler transform of A054748. %H A054749 M. A. Harrison, <a href="http://dx.doi.org/10.4153/CJM-1965-010-9">A census of finite automata</a>, Canad. J. Math., 17, No. 1, 1965, 100-113. %K A054749 nonn %O A054749 1,2 %A A054749 _Vladeta Jovovic_, Apr 22 2000 %E A054749 More terms from _Sean A. Irvine_, Feb 21 2022