A026973 - OEIS

%I #8 Oct 20 2019 19:54:15

%S 1,8,52,224,1131,4620,23456,92752,460170,1805760,8946216,34942176,

%T 172593267,673129380,3323413216,12954246368,63944790462,249263001360,

%U 1230668687000,4798770328960,23700302314238,92457112946968,456814709763456,1782991313610720,8813232700137268

%N a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026648.

%K nonn

%O 2,2

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Oct 20 2019