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 A000843 #20 Mar 11 2020 18:00:12 %S A000843 0,0,0,1,1,4,12,66,433,3442,30404,294951,3093770,34846185,419020738, %T A000843 5355289843,72466668921,1034818990771,15548633703424,245182764121059, %U A000843 4047990858838185,69826392559499108,1256005988628521464,23517396850332614602,457623646061902648705 %N A000843 Number of quartic bicolored graphs on n unlabeled nodes admitting an automorphism exchanging the colors. %Y A000843 Column k=4 of A333159. %Y A000843 Cf. A000513, A000840. %K A000843 nonn %O A000843 1,6 %A A000843 _Brendan McKay_ and Eric Rogoyski %E A000843 a(11)-a(25) from _Andrew Howroyd_, Mar 10 2020