A090114 a(n) = Product_{j=1..n} (prime(n)-j).

1, 2, 24, 360, 30240, 665280, 57657600, 1764322560, 180503769600, 47621141568000, 2180547008640000, 599555620984320000, 74931129164795904000, 4608264443634948096000, 669187660275478536192000, 216826941136228916613120000, 70265584374661732509573120000, 5922384968721488882949734400000

Offset

1,2

Links

Table of n, a(n) for n=1..18.

Example

n=5: prime(5)=11, a(5)=(11-1)*(11-2)*(11-3)*(11-4)*(11-5) = 10.9.8.7.6 = 30240.

Mathematica

Table[Apply[Times, Table[Prime[w]-j, {j, 1, w}]], {w, 1, 15}]

Prog

(PARI) a(n) = prod(j=1, n, prime(n) - j); \\ Michel Marcus, Aug 27 2019

Crossrefs

Sequence in context: A126804 A344057 A170913 * A188953 A081685 A288944

Adjacent sequences: A090111 A090112 A090113 * A090115 A090116 A090117

Keyword

nonn

Author

Labos Elemer, Jan 08 2004

Extensions

More terms from Michel Marcus, Aug 27 2019

Status

approved