Number of nX6 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.
A268807
Number of nX6 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =336a(1) =1972a(2) =14308a(3) =135912a(4) =1316226a(5) =12432856a(6) =115671422a(7) =1062318610a(8) =9657289546a(9) =87052567448a(10) =779167091050
External references
- oeis: A268807