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 A203431 v(n+1)/v(n), where v=A203418. 3
 2, 3, 30, 72, 1440, 4536, 142560, 544320, 23950080, 106142400, 6107270400, 30569011200, 2198617344000, 12197035468800, 1061932177152000, 6440034727526400, 662645678542848000, 4347023441080320000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA f[j_] := j + Floor[j/2]; z = 18; v[n_] := Product[Product[f[k] - f[j], {j, 1, k - 1}], {k, 2, n}] d[n_] := Product[(i - 1)!, {i, 1, n}] Table[v[n], {n, 1, z}]              (* A203430 *) Table[v[n + 1]/v[n], {n, 1, z - 1}] (* A203431 *) Table[v[n]/d[n], {n, 1, 20}]        (* A203432 *) CROSSREFS Cf. A203430, A203432, A032766. Sequence in context: A032814 A167453 A095927 * A137981 A110351 A217370 Adjacent sequences:  A203428 A203429 A203430 * A203432 A203433 A203434 KEYWORD nonn AUTHOR Clark Kimberling, Jan 02 2012 STATUS approved

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