1,2

Numbers n which are in A050414 or in A057732 but not in both. [From R. J. Mathar, Mar 29 2010]

Table of n, a(n) for n=1..54.

a(1)=1 because 2^1-3=-1 is nonprime and 2^1+3=5 is prime.

Cf. A050414, A057732.

Sequence in context: A186155 A181713 A047482 * A062288 A077059 A260166

Adjacent sequences: A174269 A174270 A174271 * A174273 A174274 A174275

nonn

Juri-Stepan Gerasimov, Mar 14 2010

Corrected by Charles R Greathouse IV, Mar 20 2010

approved