Number of n X 3 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302260
Number of n X 3 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =29a(2) =153a(3) =818a(4) =4386a(5) =23516a(6) =126162a(7) =676988a(8) =3632880a(9) =19495940a(10) =104627364a(11) =561499304a(12) =3013389264a(13) =16171937024a(14) =86789899608a(15) =465775377536
External references
- oeis: A302260