A156150 Primes p such that p+2 = 0 (mod pi(p)) and pi(p)=A000720(p) is prime.

31, 353, 9559783, 9559903

Offset: 1

Author

M. F. Hasler, Feb 04 2009

Keywords

• hard
• more
• nonn

Comments

A subsequence of A156151.

Crossrefs

Cf. A156153.

Programs

PARI

p=c=0; until(0, until( isprime(c++), p=nextprime(p+1)); (p+2)%c & next; print1( p","))

Formula

a(n) = A000040(A156149(n))