Number of 3 X n binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.
A268888
Number of 3 X n binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.
Terms
- a(0) =0a(1) =20a(2) =84a(3) =501a(4) =2190a(5) =9996a(6) =42362a(7) =178400a(8) =732378a(9) =2974934a(10) =11933578a(11) =47466417a(12) =187325260a(13) =734639334a(14) =2865135348a(15) =11121381104a(16) =42989239524a(17) =165564387000a(18) =635557701344
External references
- oeis: A268888