Number of zero-sum nX2 -2..2 arrays with every element unequal to at most two horizontal and vertical neighbors.
A201797
Number of zero-sum nX2 -2..2 arrays with every element unequal to at most two horizontal and vertical neighbors.
Terms
- a(0) =5a(1) =85a(2) =455a(3) =3617a(4) =28625a(5) =235827a(6) =1972115a(7) =16703881a(8) =142672901a(9) =1226999941a(10) =10610923603a(11) =92180196507a(12) =803840798219
External references
- oeis: A201797