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 A277840 #14 Nov 05 2016 08:41:06 %S A277840 1,44,142336,244698934716,347256965617453111707, %T A277840 683647218221456315461840833799588, %U A277840 2846969183281612697167894035560332610102537605107,35612941825082950044316879351953518880328546726186269125209259942000,1805164781998352977708541832242375664226097624365740577986086562708182817353463604362494621 %N A277840 Number of finite automata with n states, n input symbols and two output symbols. %H A277840 Scott Burns, Marko Riedel, Markus Scheuer, <a href="http://math.stackexchange.com/questions/1968594/">Number of functions</a>, Math StackExchange. %H A277840 Scott Burns, Marko Riedel, Markus Scheuer, <a href="http://math.stackexchange.com/questions/1993637/">Enumeration of finite automata</a>, Math StackExchange. %H A277840 F. Harary and E. Palmer, <a href="http://dx.doi.org/10.1016/S0019-9958(67)91186-2">Enumeration of finite automata</a>, Information and Control, 10 (1967), 499-508. %H A277840 Marko Riedel, <a href="/A277839/a277839.maple.txt">Maple code for A277839-A277844.</a> %Y A277840 Cf. A277839, A277841, A277842, A277843, A277844. %K A277840 nonn %O A277840 1,2 %A A277840 _Marko Riedel_, Nov 01 2016