1,1

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

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.

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

Sequence in context: A030055 A155636 A055902 this_sequence A142364 A164301 A087305

Adjacent sequences: A132258 A132259 A132260 this_sequence A132262 A132263 A132264

more,nonn

Jonathan Vos Post (jvospost3(AT)gmail.com), Aug 15 2007