T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.
A187441
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.
Terms
- a(0) =81a(1) =646a(2) =646a(3) =5344a(4) =14178a(5) =5344a(6) =44195a(7) =311730a(8) =311730a(9) =44195a(10) =365485a(11) =6858445a(12) =18257013a(13) =6858445a(14) =365485a(15) =3022484a(16) =150878368a(17) =1070374436a(18) =1070374436a(19) =150878368a(20) =3022484a(21) =24995294a(22) =3319295436a(23) =62735788524a(24) =167339492229
External references
- oeis: A187441