A251965 Indices of primes in A055729(m), where A055729(m) is the number of primes <= 3^m.

1, 5, 11, 13, 14, 31

Offset: 1

Author

David Baugh, Mar 21 2015

Keywords

• nonn
• more

Comments

A055729 is the sequence primepi(3^n). A087865 are the terms of A055729 that are prime. a(n) is the index of the n-th prime term in A055729.

Examples

			1 is a term since A055729(1) = 2 is prime.
The next prime appearing in A055729 is 53, which occurs at index 5, so a(2)=5.
		

Crossrefs

Cf. A055729, A087865.

Programs

Mathematica

Select[Range@49,PrimeQ[PrimePi[3^#]]&]