A045905 - OEIS

%I #15 Mar 08 2020 03:35:36

%S 0,0,0,0,1,2,16,80,473,2517,13431,69357,353943,1780894,8886254,

%T 44024308,217021967,1065653519,5217704239,25491204743,124335254416,

%U 605720277647,2948274685881,14341442951945,69732440151924

%N Catafusenes (see reference for precise definition).

%D 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 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 Last column of A121178.

%K nonn

%O 0,6

%A _N. J. A. Sloane_