A026994 - OEIS

%I #9 Oct 21 2019 02:09:30

%S 1,8,55,348,2089,10930,59507,303260,1541766,7603878,39661955,

%T 193854488,942975507,4575005798,23493563115,113291185280,541966221369,

%U 2614491663880,13324328958963,63919218781860,303531944623232,1461173082833662,7413731116928658,35490915453285426

%N a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026692.

%K nonn

%O 3,2

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Oct 21 2019