203136

Appears in sequences

• Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.at n=18A252108
• Number of labeled clutters (connected antichains) spanning n vertices with singleton edges allowed.at n=5A304985