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A026949 a(n) = Sum{T(n,k)*T(n,k+3)}, 0<=k<=n-3, T given by A026374. 0

%I

%S 1,12,83,630,3171,21672,97482,639180,2730615,17543196,72932904,

%T 463291920,1895949055,11961944400,48478715240,304543085040

%N a(n) = Sum{T(n,k)*T(n,k+3)}, 0<=k<=n-3, T given by A026374.

%K nonn

%O 3,2

%A _Clark Kimberling_

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Last modified February 20 21:45 EST 2019. Contains 320362 sequences. (Running on oeis4.)