Number of nX7 0..1 arrays with every element equal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300426
Number of nX7 0..1 arrays with every element equal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =981a(2) =37042a(3) =1240541a(4) =41940055a(5) =1429216222a(6) =48707694395
External references
- oeis: A300426