1,1

Table of n, a(n) for n=1..16.

a(1)=97 because is the first prime such that p(n)-p(n-1)+1 is not prime. (97-89+1=15, and 15 is not prime)

Cf. A000040 (the prime numbers), A001223 (difference between primes)

Sequence in context: A038133 A144325 A234101 * A216311 A258877 A073076

Adjacent sequences: A161364 A161365 A161366 * A161368 A161369 A161370

nonn

Leonardo Sznajder, Jun 08 2009

approved