110953domain: NAppears in sequencesa(n) = (((6^n mod 5^n) mod 4^n) mod 3^n) mod 2^n.at n=16A064855Numbers k such that (2^k - 1)^2 - 2 = 4^k - 2^(k+1) - 1 is prime.at n=34A091515a(n) is the number of distinct resistances that can be produced from a circuit with exactly n unit resistors.at n=13A337517