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 A341855 #5 Feb 23 2021 10:07:35 %S A341855 1,2,4,20,93,554,3554,24256,171676,1255194,9399396,71837656,558420702, %T A341855 4404369524,35176227916,284034186632,2315677128324,19041443086870, %U A341855 157775390173844,1316314747361426,11050281929647605,93289306725561418,791625463473512860,6749144798353446552 %N A341855 Number of nonseparable trivalent maps with n nodes up to orientation preserving automorphisms. %Y A341855 Antidiagonal sums of A262586. %Y A341855 Cf. A005027, A005028. %K A341855 nonn %O A341855 3,2 %A A341855 _Andrew Howroyd_, Feb 22 2021