Number of nX5 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
A301948
Number of nX5 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =3a(1) =52a(2) =680a(3) =9084a(4) =120815a(5) =1608681a(6) =21418808a(7) =285190208a(8) =3797277789a(9) =50560399640a(10) =673206912325
External references
- oeis: A301948