A233734 Central terms of triangles A019538 and A090582.

1, 6, 150, 8400, 834120, 129230640, 28805736960, 8734434508800, 3457819037312640, 1732015476199008000, 1070842073499515116800, 800968643959240044288000, 712900933001021056900608000, 744602794912654938776355840000, 901893717412811100821094451200000

Offset

1,2

Comments

a(n) = A019538(2*n-1,n) = A090582(2*n-1,n).

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..200

Formula

a(n) = A129506(n) * n!.

Prog

(Haskell)
a233734 n = a019538 (2 * n - 1) n

Crossrefs

Sequence in context: A285747 A013296 A013301 * A227044 A188420 A089482

Adjacent sequences: A233731 A233732 A233733 * A233735 A233736 A233737

Keyword

nonn

Author

Reinhard Zumkeller, Dec 15 2013

Status

approved