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A027270 a(n) = Sum_{k=0..2n-3} T(n,k) * T(n,k+3), with T given by A026536. 0

%I

%S 10,104,420,3786,14826,131264,510576,4508580,17523506,154773696,

%T 602175444,5323519838,20744201142,183586707648,716553432640,

%U 6348284151024,24816637181076,220081449149440,861581808936200,7647723960962932,29978812970646870,266322435212031984

%N a(n) = Sum_{k=0..2n-3} T(n,k) * T(n,k+3), with T given by A026536.

%K nonn

%O 3,1

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Oct 26 2019

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Last modified May 8 06:22 EDT 2021. Contains 343653 sequences. (Running on oeis4.)