A132261 Main diagonal of array in A132260.

13, 107, 101, 491, 8039, 9349

Offset: 1

Author

Jonathan Vos Post, Aug 15 2007

Keywords

• more
• nonn

Examples

			a(1) = 13 because 13 is the first prime p such that 2^2^3 + p^2^3 is prime.
a(2) = 107 because 107 is the 2nd prime p such that 2^2^4 + p^2^4 is prime.
a(3) = 101 because 101 is the 3rd prime p such that 2^2^5 + p^2^5 is prime.
		

Crossrefs

Cf. A000040, A001016, A050997, A120398, A122616, A130873, A130555, A132214, A132215, A132216, A132260.

Formula

a(n) = A[n,n+2] = n-th prime p such that 2^2^(n+2) + p^2^(n+2) is prime.