Number of zero-sum nX3 -2..2 arrays with every element equal to at least one horizontal or vertical neighbor.
A201886
Number of zero-sum nX3 -2..2 arrays with every element equal to at least one horizontal or vertical neighbor.
Terms
- a(0) =1a(1) =63a(2) =765a(3) =26003a(4) =559115a(5) =16513425a(6) =435630965a(7) =12576072219a(8) =355197660509
External references
- oeis: A201886