Number of n X 3 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 4 binary array having two adjacent 1's and two adjacent 0's.
A227439
Number of n X 3 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 4 binary array having two adjacent 1's and two adjacent 0's.
Terms
- a(0) =8a(1) =62a(2) =457a(3) =3346a(4) =24568a(5) =180575a(6) =1327102a(7) =9752326a(8) =71665377a(9) =526639966a(10) =3870071062a(11) =28439626805a(12) =208991567034
External references
- oeis: A227439