Number of n X 4 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 5 binary array having two adjacent 1's and two adjacent 0's.
A227440
Number of n X 4 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 5 binary array having two adjacent 1's and two adjacent 0's.
Terms
- a(0) =16a(1) =240a(2) =3346a(3) =46126a(4) =636996a(5) =8802600a(6) =121623396a(7) =1680297950a(8) =23214121178a(9) =320714593384
External references
- oeis: A227440