Number of nX7 0..1 arrays with every element unequal to 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318221
Number of nX7 0..1 arrays with every element unequal to 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =45a(2) =1975a(3) =123415a(4) =6735734a(5) =381426500a(6) =21578384304
External references
- oeis: A318221