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A026990 a(n) = Sum_{k=0..n} (k+1) * A026681(n, k). 0
1, 3, 10, 30, 78, 189, 480, 1242, 3030, 7084, 17112, 42146, 99792, 229065, 540544, 1298851, 3025386, 6871084, 15993500, 37857267, 87275980, 196867143, 454118616, 1064055225, 2435780334, 5468505723, 12533827796, 29153115186 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..27.

CROSSREFS

Sequence in context: A006484 A144007 A026960 * A254822 A027256 A332360

Adjacent sequences: A026987 A026988 A026989 * A026991 A026992 A026993

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 5 22:19 EST 2023. Contains 360087 sequences. (Running on oeis4.)