Number of n X n symmetric 0..1 arrays with each element equal to the sum mod 2 of two of its horizontal and vertical neighbors.
A193118
Number of n X n symmetric 0..1 arrays with each element equal to the sum mod 2 of two of its horizontal and vertical neighbors.
Terms
- a(0) =0a(1) =1a(2) =5a(3) =39a(4) =647a(5) =21146a(6) =1250105a(7) =139314922a(8) =29548707285
External references
- oeis: A193118