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A026988 a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026681. 0
1, 10, 69, 340, 1696, 8774, 44500, 203884, 998953, 5026154, 24474925, 110862660, 540493911, 2706193730, 13062307900, 59214077236, 288140818097, 1439810493778, 6934754735653, 31544380215556, 153401000364266, 765589966351344, 3686304297844080, 16830906540844256, 81840064308561274 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..26.

CROSSREFS

Sequence in context: A330352 A321060 A026958 * A081280 A038806 A016273

Adjacent sequences: A026985 A026986 A026987 * A026989 A026990 A026991

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 21 2019

STATUS

approved

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Last modified February 3 17:00 EST 2023. Contains 360044 sequences. (Running on oeis4.)