Number of zero-sum nX4 -1..1 arrays with every element unequal to at most two horizontal and vertical neighbors.
A202043
Number of zero-sum nX4 -1..1 arrays with every element unequal to at most two horizontal and vertical neighbors.
Terms
- a(0) =19a(1) =335a(2) =2921a(3) =31753a(4) =359017a(5) =4188917a(6) =49553277a(7) =594443301a(8) =7206865523a(9) =88120417529
External references
- oeis: A202043