A027985 - OEIS

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

%S 6,35,144,564,2186,8468,32856,127729,497454,1940525,7580656,29651385,

%T 116111194,455138499,1785707924,7011933544,27554583254,108355491404,

%U 426368213364,1678704356644,6613026412314,26064305550054,102777232982624

%N a(n) = Sum{T(n,k)*T(n,k+1)}, 0<=k<=2n-1, T given by A027960.

%K nonn

%O 1,1

%A _Clark Kimberling_