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A026957 a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026615. 0

%I #10 Oct 20 2019 16:23:34

%S 1,6,35,154,613,2362,9028,34510,132241,508210,1958460,7565906,

%T 29292820,113633930,441579702,1718642278,6698377449,26139863330,

%U 102125977396,399415127682,1563614796608,6126581578954,24024810462810,94281930087290,370254213115948,1454967778894282

%N a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026615.

%K nonn

%O 1,2

%A _Clark Kimberling_

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

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Last modified May 7 17:41 EDT 2024. Contains 372312 sequences. (Running on oeis4.)