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 A361406 #7 Mar 11 2023 18:26:35 %S A361406 1,0,1,5,63,1052,27336,882321,34455134,1558650424,80016369538, %T A361406 4589908631503,290839634055722,20171917072658395,1519875854413728667, %U A361406 123616508830454828043,10794216583730162449785,1007179737486515827821590,100007950522974604304016627,10529173417583858651114779790,1171605981584666223513790021758 %N A361406 Number of bicolored connected cubic graphs on 2n unlabeled vertices with n vertices of each color. %C A361406 Adjacent vertices may have the same color. %e A361406 a(1) = 1 since the only cubic graph on 4 vertices is the complete graph. The bicolored graphs are indistinguishable whichever 2 vertices are colored in the first color. %Y A361406 Central coefficients of A321304. %Y A361406 Cf. A002851, A361407, A361408. %K A361406 nonn %O A361406 0,4 %A A361406 _Andrew Howroyd_, Mar 11 2023