1520436

Appears in sequences

• Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 1 3 6 or 7.at n=16A252185
• Expansion of Product_{k>=1} ((1 + 4*x^k) / (1 - 4*x^k))^(1/2).at n=11A303392