Number of nX4 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.
A207496
Number of nX4 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.
Terms
- a(0) =9a(1) =81a(2) =283a(3) =1004a(4) =3939a(5) =15495a(6) =62530a(7) =253747a(8) =1040401a(9) =4290258a(10) =17800079a(11) =74193193a(12) =310541536a(13) =1304248843a(14) =5493846571a(15) =23198279836a(16) =98159361513a(17) =416061031363
External references
- oeis: A207496