93671domain: NAppears in sequencesa(n) = 1 + 2*n + n^2 + 2*n^3 + n^4.at n=17A165563a(2n)=A165568(n). a(2n+1)=A165563(n).at n=35A171733Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 2 3 4 6 or 7.at n=9A252401