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A027305 a(n) = Sum_{k=0..floor((n+1)/2)} (k+1) * A008315(n, k). 0
1, 3, 5, 13, 24, 58, 111, 257, 500, 1126, 2210, 4882, 9632, 20980, 41531, 89497, 177564, 379438, 754014, 1600406, 3184016, 6720748, 13382710, 28117498, 56026984, 117254268, 233765636, 487589572, 972504704, 2022568168 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..29.

FORMULA

a(2n) = A065982(n+1)/2 = (n+2)*binomial(2n+2, n+1)/2 - 4^n.

CROSSREFS

Cf. A065982.

Sequence in context: A026733 A005824 A336103 * A026766 A026709 A219699

Adjacent sequences:  A027302 A027303 A027304 * A027306 A027307 A027308

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 9 07:53 EST 2021. Contains 349627 sequences. (Running on oeis4.)