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A203316 v(n+1)/v(n), where v=A203315. 3
1, 4, 96, 480, 20160, 129024, 8294400, 1423319040, 8453652480, 2463635865600, 89117289676800, 660834091008000, 63038756487168000, 20712734274355200000, 4023397460155878604800, 27460572284725493760000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

MATHEMATICA

f[j_] := Prime[j + 1]; z = 17;

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}]                  (* A203315 *)

Table[v[n + 1]/(2 v[n]), {n, 1, z - 1}] (* A203316 *)

Table[v[n]/d[n], {n, 1, 20}]            (* A203317 *)

CROSSREFS

Cf. A203315, A203317, A000040.

Sequence in context: A188895 A068114 A272109 * A202682 A089639 A269091

Adjacent sequences:  A203313 A203314 A203315 * A203317 A203318 A203319

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 01 2012

STATUS

approved

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Last modified July 10 15:45 EDT 2020. Contains 335577 sequences. (Running on oeis4.)