A132261 - OEIS

%I #3 Mar 30 2012 18:40:43

%S 13,107,101,491,8039,9349

%N Main diagonal of array in A132260.

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

%e a(1) = 13 because 13 is the first prime p such that 2^2^3 + p^2^3 is prime.

%e a(2) = 107 because 107 is the 2nd prime p such that 2^2^4 + p^2^4 is prime.

%e a(3) = 101 because 101 is the 3rd prime p such that 2^2^5 + p^2^5 is prime.

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

%K more,nonn

%O 1,1

%A _Jonathan Vos Post_, Aug 15 2007