Number of 7Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
A301956
Number of 7Xn 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) =0a(1) =233a(2) =5820a(3) =439078a(4) =21418808a(5) =1427656268a(6) =86143630040
External references
- oeis: A301956