A089367 Smallest prime p such that np +1 is a prime, or 0 if no such prime exists.

2, 2, 2, 3, 2, 2, 0, 2, 2, 3, 2, 3, 0, 2, 2, 7, 0, 2, 0, 2, 2, 3, 2, 3, 0, 2, 0, 7, 2, 2, 0, 3, 2, 3, 2, 2, 0, 5, 2, 7, 2, 3, 0, 2, 0, 3, 0, 2, 0, 2, 2, 3, 2, 2, 0, 2, 0, 19, 0, 3, 0, 5, 2, 3, 2, 3, 0, 2, 2, 3, 0, 13, 0, 2, 2, 3, 0, 2, 0, 3, 2, 19, 2, 5, 0, 2, 0, 7, 2, 2, 0, 3, 0, 3, 2, 2, 0, 2, 2, 7, 0, 3, 0, 3