Number of 3 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 1 vertically.
A207454
Number of 3 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 1 vertically.
Terms
- a(0) =6a(1) =36a(2) =90a(3) =330a(4) =1008a(5) =3354a(6) =10710a(7) =34884a(8) =112530a(9) =364722a(10) =1179360a(11) =3817938a(12) =12352782a(13) =39978180a(14) =129366090a(15) =418647162a(16) =1354755024a(17) =4384104618a(18) =14187219750a(19) =45910873476a(20) =148570600866a(21) =480784736226
External references
- oeis: A207454