15362146799domain: NAppears in sequencesThe n-th term is the smallest integer > 1 that is congruent to +1 or -1 modulo k for all 2 <= k <= n.at n=27A317650The n-th term is the smallest integer > 1 that is congruent to +1 or -1 modulo k for all 2 <= k <= n.at n=28A317650