47127domain: NAppears in sequencesDivisors of 2^22 - 1.at n=11A003531Divisors of 2^44 - 1.at n=33A003549Third left hand column of triangle A163940.at n=23A163943a(n) = time to the nearest second at the n-th instant (n>=0) when the hour and minute hands on a clock face coincide, starting at time 0:00.at n=12A335789