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A027331 a(n) = Sum_{k=0..m} T(n,k) * T(n,k+2), where m=2 for n=2 and m=n+1 for n >= 3; and T is given by A026148. 0

%I

%S 5,36,293,2374,19398,159072,1310669,10844525,90088935,751173656,

%T 6284938344,52752138077,444072874534,3748425872686,31720368301774,

%U 269056938823323,2287158222456938,19481849054942368,166260043774604820,1421400361753347588,12172156656845655429

%N a(n) = Sum_{k=0..m} T(n,k) * T(n,k+2), where m=2 for n=2 and m=n+1 for n >= 3; and T is given by A026148.

%K nonn

%O 2,1

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Oct 27 2019

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Last modified May 24 14:36 EDT 2022. Contains 354037 sequences. (Running on oeis4.)