Number of n X 2 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.
A293081
Number of n X 2 0..1 arrays with the number of 1's horizontally 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) =1a(3) =10a(4) =60a(5) =304a(6) =1420a(7) =6312a(8) =27167a(9) =114412a(10) =474563a(11) =1947098a(12) =7925708a(13) =32072580a(14) =129213082a(15) =518818124a(16) =2077775396a(17) =8304424080a(18) =33138971978a(19) =132078954532a(20) =525904271587
External references
- oeis: A293081