Number of nX4 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318064
Number of nX4 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =2a(1) =67a(2) =649a(3) =7170a(4) =76927a(5) =829137a(6) =8929364a(7) =96178466a(8) =1035919809a(9) =11157725916a(10) =120178061288
External references
- oeis: A318064