9918146448domain: NAppears in sequencesNumber of (n+1) X (2+1) 0..3 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors.at n=5A238519T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors.at n=22A238523