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A227325 A000272(n+1) * A000984(n). 2
1, 2, 18, 320, 8750, 326592, 15529668, 899678208, 61556811030, 4862000000000, 435644983598396, 43678490079264768, 4846281282497517772, 589650705050503577600, 78074729079345703125000, 11177395284330167371038720, 1720546364146510165684599270 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Central terms of triangle A088956.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..250

FORMULA

a(n) = A088956(2*n, n) = (n+1)^(n-1) * C(2*n, n).

PROG

(Haskell)

a227325 n = a000272 (n + 1) * a000984 n

CROSSREFS

Sequence in context: A179497 A296837 A326270 * A087215 A229490 A192985

Adjacent sequences:  A227322 A227323 A227324 * A227326 A227327 A227328

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jul 07 2013

EXTENSIONS

Typo in formula fixed by Zak Seidov, Jul 08 2013

STATUS

approved

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Last modified April 4 21:25 EDT 2020. Contains 333238 sequences. (Running on oeis4.)