4209661domain: NAppears in sequencesNumbers that occur more than once in A193873, in order of appearance.at n=16A194263Sarrus numbers (A001567) that are the average of two consecutive primes.at n=24A265684Composite integers k satisfying 2^d == 2^(k/d) (mod k) for all d|k and that are not Super-Poulet (A050217).at n=23A291602