Number of 6Xn 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.
A268976
Number of 6Xn 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =729a(1) =39936a(2) =808704a(3) =16061328a(4) =305242992a(5) =5712070032a(6) =105294777120
External references
- oeis: A268976