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A027269 a(n) = Sum_{k=0..2n-2} T(n,k) * T(n,k+2), with T given by A026536. 0
5, 19, 150, 561, 4797, 18089, 156900, 596674, 5205950, 19932353, 174609162, 672106267, 5906040623, 22829936683, 201114700568, 780077588440, 6885880226784, 26784015828458, 236826459554380, 923352937530146, 8175978023317170, 31940549289135429, 283166067626865540 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..24.

CROSSREFS

Sequence in context: A228479 A187018 A193287 * A082790 A145935 A024529

Adjacent sequences:  A027266 A027267 A027268 * A027270 A027271 A027272

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 26 2019

STATUS

approved

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Last modified May 13 16:56 EDT 2021. Contains 343862 sequences. (Running on oeis4.)