A048463 Smallest prime occurring in generation n (0 if none).

2, 3, 7, 13, 97, 127, 127, 757, 0, 8933, 0, 18917, 49193, 53831, 71023, 71023, 0, 0, 17427659, 30196487, 0, 0, 0, 0, 1586875049, 988142237, 7021048691, 1397537747, 0, 2760703019, 2760703019, 0, 0, 1033545746063, 0, 0, 7916712387631, 0, 0, 0