Number of (n+1)X(4+1) 0..1 arrays with every element equal to some horizontal, vertical, diagonal or antidiagonal neighbor, with top left element zero.
A231953
Number of (n+1)X(4+1) 0..1 arrays with every element equal to some horizontal, vertical, diagonal or antidiagonal neighbor, with top left element zero.
Terms
- a(0) =236a(1) =7756a(2) =220472a(3) =6517534a(4) =193955142a(5) =5764579644a(6) =171279257338
External references
- oeis: A231953