Number of 2 X n binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
A269076
Number of 2 X n binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =4a(1) =11a(2) =27a(3) =76a(4) =185a(5) =489a(6) =1204a(7) =3059a(8) =7539a(9) =18748a(10) =46001a(11) =112977a(12) =275620a(13) =671387a(14) =1629003a(15) =3944428a(16) =9524969a(17) =22955577a(18) =55208404a(19) =132545027a(20) =317673891a(21) =760222300a(22) =1816668257a(23) =4335499425a(24) =10333941316a(25) =24603369515a(26) =58513434747a(27) =139020574348
External references
- oeis: A269076