Number of nX7 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
A301950
Number of nX7 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) =8a(1) =549a(2) =23565a(3) =1029960a(4) =45013365a(5) =1969215107a(6) =86143630040
External references
- oeis: A301950