T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

A186482

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

Terms

    a(0) =256a(1) =205a(2) =205a(3) =1098a(4) =362a(5) =1098a(6) =1251a(7) =701a(8) =701a(9) =1251a(10) =4895a(11) =2049a(12) =4686a(13) =2049a(14) =4895a(15) =5955a(16) =3442a(17) =4810a(18) =4810a(19) =3442a(20) =5955a(21) =20079a(22) =8223a(23) =20224a(24) =16762a(25) =20224a(26) =8223a(27) =20079a(28) =27101a(29) =14492

External references