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 A045905 #15 Mar 08 2020 03:35:36 %S A045905 0,0,0,0,1,2,16,80,473,2517,13431,69357,353943,1780894,8886254, %T A045905 44024308,217021967,1065653519,5217704239,25491204743,124335254416, %U A045905 605720277647,2948274685881,14341442951945,69732440151924 %N A045905 Catafusenes (see reference for precise definition). %D A045905 S. J. Cyvin et al., Enumeration and classification of certain polygonal systems... : annelated catafusenes, J. Chem. Inform. Comput. Sci., 34 (1994), 1174-1180, ^4O = ^4F_7 page 1178. %F A045905 8*a(n) = A045829(n) + 3*A045445(n/2) + 2*A002212(n/4) + 2*A039660(n) for n > 0, where sequence values with non-integer index are implicitly defined as 0. - _R. J. Mathar_, Jul 30 2019 %Y A045905 Last column of A121178. %K A045905 nonn %O A045905 0,6 %A A045905 _N. J. A. Sloane_