Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical zero neighbors.
A197053
Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical zero neighbors.
Terms
- a(0) =7a(1) =26a(2) =156a(3) =692a(4) =3580a(5) =17742a(6) =88056a(7) =439338a(8) =2192602a(9) =10912392a(10) =54394628a(11) =271160024a(12) =1351103246a(13) =6733077562a(14) =33557756016a(15) =167232569172a(16) =833404135538
External references
- oeis: A197053