Number of 2 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.
A293101
Number of 2 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.
Terms
- a(0) =0a(1) =0a(2) =9a(3) =42a(4) =150a(5) =596a(6) =2220a(7) =8376a(8) =31959a(9) =121768a(10) =465365a(11) =1784742a(12) =6865278a(13) =26474028a(14) =102325886a(15) =396332796a(16) =1538015240a(17) =5978805044a(18) =23278677150a(19) =90767915948a(20) =354389747119
External references
- oeis: A293101