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A027209 Sum{T(n,k)*T(n,k+2), 0<=k<=n-2, T given by A026725. 0
1, 7, 34, 173, 741, 3549, 14670, 68683, 279715, 1294598, 5233060, 24052965, 96822587, 442972139, 1778697948, 8110611295, 32516501991, 147897243768, 592346459071 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..20.

CROSSREFS

Sequence in context: A124466 A055271 A209890 * A209807 A080048 A177140

Adjacent sequences:  A027206 A027207 A027208 * A027210 A027211 A027212

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 21 06:55 EDT 2019. Contains 325192 sequences. (Running on oeis4.)