A126245 (p+2)! if p prime and p+2 prime.

120, 5040, 6227020800, 121645100408832000, 8222838654177922817725562880000000, 60415263063373835637355132068513997507264512000000000

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Example

3 and 5...........5!=120
5 and 7...........7!=5040
17 and 19........19!=121645100408832000

Maple

ZL:=[]:for p from 1 to 53 do if (isprime(p) and isprime(p+2)) then ZL:=[op(ZL), ((p+2)!)]; fi; od; print(ZL);

Crossrefs

Sequence in context: A246193 A246613 A031145 * A221435 A229636 A282431

Adjacent sequences: A126242 A126243 A126244 * A126246 A126247 A126248

Keyword

easy,nonn

Author

Zerinvary Lajos, Mar 08 2007

Status

approved