Number of nX5 0..1 arrays with every element equal to 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
A301996
Number of nX5 0..1 arrays with every element equal to 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =3a(1) =18a(2) =84a(3) =468a(4) =2856a(5) =17800a(6) =110036a(7) =674984a(8) =4130664a(9) =25284068a(10) =154853080a(11) =948637896a(12) =5811528980a(13) =35601208264a(14) =218086661704
External references
- oeis: A301996