Number of n X 5 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302221
Number of n X 5 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =3a(1) =146a(2) =760a(3) =6110a(4) =40395a(5) =292781a(6) =2043848a(7) =14419536a(8) =101511446a(9) =713030990a(10) =5019470018a(11) =35283108018a(12) =248180957058
External references
- oeis: A302221