35278domain: NAppears in sequencesFibonacci sequence beginning 5, 19.at n=17A022143Numbers k such that (2*k)!/(2*(k!)^2) - 1 is prime.at n=32A112861Numbers that are divisible by the total number of 1's in both the Zeckendorf and the dual Zeckendorf representations of all their divisors (A300837 and A333618).at n=19A333621