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A027212 a(n) = Sum_{k=0..n} (k+1) * A026725(n, n-k). 1
1, 3, 8, 23, 55, 144, 328, 816, 1808, 4358, 9485, 22377, 48097, 111720, 237917, 546161, 1154827, 2626624, 5522464, 12467540, 26092324, 58546544, 122059348, 272479782, 566242186, 1258568324, 2608232758, 5775620396, 11940756076 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..28.

MAPLE

A027212 := proc(n)

    add( (k+1)*A026725(n, n-k), k=0..n) ;

end proc: # R. J. Mathar, Oct 21 2019

CROSSREFS

Sequence in context: A296286 A068602 A255834 * A027236 A027244 A108457

Adjacent sequences:  A027209 A027210 A027211 * A027213 A027214 A027215

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

Name corrected by R. J. Mathar, Oct 21 2019

STATUS

approved

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Last modified September 28 06:57 EDT 2021. Contains 347703 sequences. (Running on oeis4.)