T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.
A186558
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.
Terms
- a(0) =256a(1) =3891a(2) =3891a(3) =60074a(4) =227890a(5) =60074a(6) =927477a(7) =13360840a(8) =13360840a(9) =927477a(10) =14319230a(11) =783375343a(12) =2976803436a(13) =783375343a(14) =14319230a(15) =221073168a(16) =45931015744a(17) =663296784123a(18) =663296784123a(19) =45931015744a(20) =221073168a(21) =3413126694
External references
- oeis: A186558