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 A216628 a(n) = A163085(n)/n!. 1
 1, 1, 1, 2, 3, 18, 60, 1200, 10500, 735000, 18522000, 4667544000, 359400888000, 332086420512000, 81408613942656000, 279394363051195392000, 224737840779305293440000, 2892376010829659126572800000, 7812628980363223707442752000000, 379850021025259936655866602240000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Table of n, a(n) for n=0..19. PROG (Sage) def A216628(n): swing = lambda n: factorial(n)/factorial(n//2)^2 A163085 = lambda n: mul(swing(i) for i in (0..n)) return A163085(n)/factorial(n) [A216628(n) for n in (0..19)] CROSSREFS Cf. A056040. Sequence in context: A347429 A211867 A003693 * A048047 A114165 A166510 Adjacent sequences: A216625 A216626 A216627 * A216629 A216630 A216631 KEYWORD nonn AUTHOR Peter Luschny, Sep 18 2012 STATUS approved

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Last modified April 20 00:26 EDT 2024. Contains 371798 sequences. (Running on oeis4.)