A126244 p! if p prime and p+2 prime.

6, 120, 39916800, 355687428096000, 8841761993739701954543616000000, 33452526613163807108170062053440751665152000000000, 138683118545689835737939019720389406345902876772687432540821294940160000000000000

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

3 and 5...........3!=6
5 and 7...........5!=120
17 and 19........17!=39916800

Maple

ZL:=[]:for p from 1 to 71 do if (isprime(p) and isprime(p+2)) then ZL:=[op(ZL), (p!)]; fi; od; print(ZL);

Mathematica

#!&/@Transpose[Select[Partition[Prime[Range[20]], 2, 1], Last[#]-First[#] ==2&]] [[1]]  (* Harvey P. Dale, Apr 11 2011 *)

Crossrefs

Sequence in context: A317888 A053710 A336389 * A336808 A296801 A249168

Adjacent sequences: A126241 A126242 A126243 * A126245 A126246 A126247

Keyword

easy,nonn

Author

Zerinvary Lajos, Mar 08 2007

Status

approved