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A072472 a(-1)=1, a(0) = 2; a(n) = product of numbers from p(n)+1 up to p(n+1), where p(n) is the n-th prime. 2
1, 2, 3, 20, 42, 7920, 156, 57120, 342, 212520, 342014400, 930, 1673844480, 2430480, 1806, 4280760, 16529385600, 32441381280, 3660, 71852901120, 23319240, 5256, 200133133200, 44102880, 418397031360, 5827054819622400, 97990200, 10506 (list; graph; refs; listen; history; text; internal format)
OFFSET

-1,2

LINKS

Table of n, a(n) for n=-1..26.

MATHEMATICA

a[n_] := Product[k, {k, Prime[n] + 1, Prime[n + 1]}]; a[0] = 2; Table[ a[n], {n, 0, 27}]

CROSSREFS

Cf. A072470.

Sequence in context: A191423 A195686 A295365 * A233410 A318765 A055814

Adjacent sequences:  A072469 A072470 A072471 * A072473 A072474 A072475

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Jun 20 2002

EXTENSIONS

Edited by Robert G. Wilson v, Jun 21 2002

STATUS

approved

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Last modified September 27 22:36 EDT 2020. Contains 337388 sequences. (Running on oeis4.)