193749domain: NAppears in sequencesNumber of nX3 0..1 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..1 introduced in row major order.at n=12A240514Number of (m1,m2,n1,n2) in {0,1,...,n}^4 such that gcd(X^m1 + (1+X)^n1, X^m2 + (1+X)^n2) = 1 over GF(2).at n=20A245488