82121

Appears in sequences

• Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.at n=10A252144
• a(n) = (n + 1)*(4*n^2 + 14*n + 9)/3.at n=38A268484