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 A385972 #4 Jul 13 2025 18:02:33 %S A385972 4,24,480,130560,8589803520,36893488138829168640, %T A385972 680564733841876926889855726716117319680, %U A385972 231584178474632390847141970017375815705859404597439251151988418800962722856960 %N A385972 The long legs of the triangles defined in A365577. %Y A385972 Cf. A365577, A385973. %K A385972 nonn,easy %O A385972 1,1 %A A385972 _Miguel-Ángel Pérez García-Ortega_, Jul 13 2025