A027987 - OEIS

%I #5 Mar 30 2012 18:56:16

%S 58,272,1154,4757,19378,78422,315994,1269270,5086294,20345092,

%T 81265106,324240331,1292556986,5149091916,20500830986,81586994576,

%U 324577199086,1290904257426,5133037194706,20407032157936,81119882902118

%N a(n) = Sum{T(n,k)*T(n,k+3)}, 0<=k<=2n-3, T given by A027960.

%K nonn

%O 3,1

%A _Clark Kimberling_