A027224 - OEIS

%I #9 Oct 25 2019 04:57:50

%S 1,6,24,132,500,2728,10324,56651,215323,1191987,4549786,25420734,

%T 97369588,548884043,2108335364,11983465575,46136052623,264215445322,

%U 1019173758683,5876647410170,22705355331214,131727633042981,509673506069905,2973264727753047,11518483809430525

%N a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026747.

%K nonn

%O 1,2

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Oct 24 2019