A139191 Natural numbers of the form (prime(n)!-3)/3.

1, 39, 1679, 13305599, 2075673599, 118562476031999, 40548366802943999, 8617338912961658879999, 2947253997913233984847871999999, 2740946218059307605908520959999999, 4587917697075448348771993193860300799999999, 11150842204387935702723354017813583888383999999999, 20138421021124611879118377356171332502421503999999999, 86207747170389393547654785051203993323065877463039999999999, 1424961094686675188099337917796466549896781262788937908223999999999999

Offset

1,2

Links

Table of n, a(n) for n=1..15.

Formula

a(n)=(A139189(n+1)-2)/3. - R. J. Mathar, May 25 2008

Mathematica

Table[(Prime[n]! - 3)/3, {n, 2, 20}]

Crossrefs

Cf. A139189, A139190, A139191, A139192, A139193, A139194, A139195, A139196, A139197, A139198.

Sequence in context: A009983 A269028 A158768 * A319490 A327589 A176073

Adjacent sequences: A139188 A139189 A139190 * A139192 A139193 A139194

Keyword

nonn

Author

Artur Jasinski, Apr 11 2008

Extensions

More terms from R. J. Mathar, May 25 2008

Status

approved