A026977 - OEIS

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A026977

a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026659.

%I #8 Oct 20 2019 19:49:20

%S 1,4,24,90,365,1376,7365,28002,121049,465004,2437089,9396986,41758527,

%T 162167568,842470494,3277804402,14798196587,57865149612,299015494394,

%U 1170434872374,5339682500573,20979019813768,107997589923134,424558473013940,1951503161793927,7693926097133316

%N a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026659.

%K nonn

%O 1,2

%A _Clark Kimberling_

%E More term from _Sean A. Irvine_, Oct 20 2019