147842domain: NAppears in sequencesNumber of (n+2) X (5+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7.at n=10A251891a(n) = Sum_k k*A333275(n,k).at n=21A333277