Number of 4Xn 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
A269055
Number of 4Xn 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =81a(1) =666a(2) =3258a(3) =24192a(4) =149358a(5) =971844a(6) =6053094a(7) =37741920a(8) =231943614a(9) =1417576284a(10) =8599619586a(11) =51899214960a(12) =311654917170
External references
- oeis: A269055