36087domain: NAppears in sequencesNumbers k such that the period of the continued fraction for sqrt(k) contains exactly 23 ones.at n=27A031791Numbers n such that the sum of prime(n) and pi(n) is divisible by n.at n=11A065139Numbers k for which 6k+1, 24k+5, 432k^2+72k-1, and 432k^2+90k-1 are all prime.at n=35A175513