58250domain: NAppears in sequencesNumber of bipartite partitions of n white objects and 4 black ones.at n=20A000465a(n) = a(n-1) + 3*a(n-2) - a(n-3) - 2*a(n-4), n > 3.at n=17A133993Integers k such that 10^k+93 is a prime number.at n=15A135112Numbers n such that n!10-1 is prime.at n=41A204658