|
| |
|
|
A079139
|
|
Numbers n such that (Product of first n twin prime pair averages [A014574] ) + 1 is prime.
|
|
1
| | |
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| a(3) and a(4) certified prime with Primo.
|
|
|
EXAMPLE
| a(2)=5 because the product of the first five terms of A014574 + 1, 4*6*12*18*30+1 = 155521, is prime.
|
|
|
PROG
| (PARI) { atp(N)= local(t, c); t=1; c=0; forprime(p=2, N, if(isprime(p+2), t*=p+1; c++; if(isprime(t+1), print1(c" ")))) }
|
|
|
CROSSREFS
| Cf. A014574.
Sequence in context: A003185 A201876 A027801 * A188349 A081070 A043025
Adjacent sequences: A079136 A079137 A079138 * A079140 A079141 A079142
|
|
|
KEYWORD
| more,nonn
|
|
|
AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Dec 26 2002
|
| |
|
|
