Number of n X 2 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.
A285146
Number of n X 2 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.
Terms
- a(0) =0a(1) =2a(2) =12a(3) =56a(4) =236a(5) =950a(6) =3752a(7) =14684a(8) =57192a(9) =222308a(10) =863808a(11) =3357766a(12) =13061980a(13) =50859826a(14) =198235896a(15) =773453896a(16) =3020781528a(17) =11809145656a(18) =46207264696a(19) =180955506800a(20) =709219185000
External references
- oeis: A285146