login
a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026374.
0

%I #9 Oct 18 2019 04:03:17

%S 1,8,58,272,1770,7428,46928,189808,1185645,4724160,29362806,116207424,

%T 720606705,2842936320,17610412600,69378730880,429579843435,

%U 1691519468760,10472653252550,41235710124400,255326054688320,1005560117623204,6227515552731528,24534901740913872

%N a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026374.

%K nonn

%O 2,2

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Oct 17 2019