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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A233734 Central terms of triangles A019538 and A090582. 4 1, 6, 150, 8400, 834120, 129230640, 28805736960, 8734434508800, 3457819037312640, 1732015476199008000, 1070842073499515116800, 800968643959240044288000, 712900933001021056900608000, 744602794912654938776355840000, 901893717412811100821094451200000 (list; graph; refs; listen; history; text; internal format) 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

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Last modified August 18 12:46 EDT 2024. Contains 375269 sequences. (Running on oeis4.)