681107245458
domain: N
Appears in sequences
- Number of (n+1)X(5+1) 0..1 arrays with every element equal to some horizontal, vertical, diagonal or antidiagonal neighbor, with top left element zero.at n=5A231954
- Number of (n+1) X (6+1) 0..1 arrays with every element equal to some horizontal, vertical, diagonal or antidiagonal neighbor, with top left element zero.at n=4A231955