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 A350971 #16 Mar 06 2022 23:08:43 %S A350971 0,0,2,6,40,180,1232,7266,56320,408360,3610112,30974526,309836800, %T A350971 3065784540,34342971392,384653685786,4778192404480,59724464976720, %U A350971 815553380483072,11249503075325046,167586815066767360,2527964965265232900,40815105402865713152,668249973079223076306,11626293107260590653440,205304046476194041001080 %N A350971 Expansion of e.g.f.: (sec(x)*tan(x))^2*(1+sin(x)). %C A350971 0, 0, followed by column 3 of A350970. %F A350971 E.g.f.: (sec(x)*tan(x))^2*(1+sin(x)). %Y A350971 Cf. A000111, A225689, A350970. %K A350971 nonn %O A350971 0,3 %A A350971 _N. J. A. Sloane_, Mar 03 2022