Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #5 Feb 22 2013 14:39:03
%S 1,1,4,37,631,17266,692785,38325925,2795925136,260056965205,
%T 30038178784699,4218296308789630,707778995370264001,
%U 139840360858571766121
%N a(n) = Sum_{k = 0..n} 3^k*A085707(n,k).
%C Sum_{k = 0..n} x^k*A085707(n,k) give A006846(n), A005647(n), A000364(n) for x = 1, 2, 4 respectively.
%Y Cf. A085707.
%K easy,nonn
%O 0,3
%A _Philippe Deléham_, Jun 04 2004