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A027273 a(n) = Sum{T(n,k)*T(n,k+1)}, 0<=k<=2n-1, T given by A026552. 0
2, 16, 52, 428, 1516, 12792, 46936, 402164, 1504432, 13015480, 49288856, 429204354, 1639174304, 14340670000, 55108565584, 483825847108 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

CROSSREFS

Sequence in context: A090453 A006885 A220139 * A210710 A225051 A033431

Adjacent sequences:  A027270 A027271 A027272 * A027274 A027275 A027276

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 21 19:19 EDT 2019. Contains 328308 sequences. (Running on oeis4.)