A128420 Numbers n such that p(n)# + p(n+1)# -1 is prime, where p(n)# is the product of first n primes (A002110).

0, 1, 3, 6, 8, 10, 12, 37, 72, 92, 142, 295, 1529, 1625, 1914, 2276, 4423

Offset

1,3

Links

Table of n, a(n) for n=1..17.

Crossrefs

Cf. A002110, A057704, A128421.

Sequence in context: A159061 A257874 A180398 * A099135 A323028 A189471

Adjacent sequences: A128417 A128418 A128419 * A128421 A128422 A128423

Keyword

nonn

Author

Pierre CAMI, Mar 02 2007

Extensions

Corrected by Emeric Deutsch, Mar 06 2007

Edited by Ray Chandler, Mar 13 2007

Status

approved