0,3

Table of n, a(n) for n=0..73.

a(0)=0 because 5^0+2^0=1+1=2 is prime,

a(5)=7 because 5^5+2^7=3125+128=3253 is prime,

Cf. A123340 = least m such that 2^n+3^m is prime, A123342 = least m such that 2^n+5^m is prime.

Cf. A123340, A123342.

Sequence in context: A030102 A072010 A255588 * A072015 A123242 A322941

Adjacent sequences: A123357 A123358 A123359 * A123361 A123362 A123363

nonn

Zak Seidov, Oct 12 2006

approved