73430domain: NAppears in sequencesNumbers n which are divisors of the number produced by concatenating (n-1), (n-2), ... (n-10) in that order.at n=19A088871Expansion of 1/(1 - x*Product_{k>=1} (1 + x^(2*k-1))).at n=19A302017Weird untouchable numbers.at n=31A357326