Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303509
Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =52a(2) =230a(3) =1596a(4) =10128a(5) =59086a(6) =377020a(7) =2366996a(8) =14512973a(9) =91007689a(10) =568325707a(11) =3528368086a(12) =22026917288a(13) =137360903740a(14) =855370949486
External references
- oeis: A303509