A026993 - OEIS

%I #11 Jul 28 2022 21:40:42

%S 1,6,32,180,984,4606,22689,114992,567129,2576582,12586319,63131004,

%T 305635176,1384074886,6739962365,33708050180,162468169385,

%U 737652413014,3588021213950,17917172173846,86273708463456,393163075111278,1911781914938634,9536792007640980,45924386118166540

%N a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026692.

%Y Cf. A026692.

%K nonn

%O 2,2

%A _Clark Kimberling_

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