Number of nX4 0..1 arrays avoiding 0 0 0 horizontally and 1 1 1 vertically.
A206990
Number of nX4 0..1 arrays avoiding 0 0 0 horizontally and 1 1 1 vertically.
Terms
- a(0) =13a(1) =169a(2) =840a(3) =6510a(4) =46878a(5) =329952a(6) =2371090a(7) =16939450a(8) =120961040a(9) =864671390a(10) =6178621414a(11) =44150290200a(12) =315500062138
External references
- oeis: A206990