108580domain: NAppears in sequencesMolien series of 4-dimensional representation of u.g.g.r. #9.at n=31A013977a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 2, -2, 1, 2.at n=19A025260Sum of two consecutive primes that is also sum of two consecutive even positive squares.at n=15A236461