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A027984 a(n) = Sum{T(n,k)*T(n,n+k)}, 0<=k<=n, T given by A027960. 0
1, 6, 20, 58, 161, 436, 1165, 3088, 8146, 21426, 56255, 147538, 386681, 1013026, 2653240, 6948058, 18193141, 47634936, 124717445, 326526748, 854877926, 2238131506, 5859556195, 15340601158, 40162350961, 105146619486, 275277778940 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..26.

CROSSREFS

Sequence in context: A127982 A109164 A212689 * A018808 A027107 A247307

Adjacent sequences:  A027981 A027982 A027983 * A027985 A027986 A027987

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified November 22 22:27 EST 2014. Contains 249835 sequences.