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a(n) = Sum_{k = 0..n} 3^k*A085707(n,k).
1

%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