T(n,k)=Number of nXk 0..7 arrays with no element x(i,j) adjacent to itself or value 7-x(i,j) horizontally, diagonally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 4 5 and 6, 2 appearing before 3 4 and 5, and 3 appearing before 4 in row major order (unlabeled 8-colorings with no clashing color pairs).
A233168
T(n,k)=Number of nXk 0..7 arrays with no element x(i,j) adjacent to itself or value 7-x(i,j) horizontally, diagonally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 4 5 and 6, 2 appearing before 3 4 and 5, and 3 appearing before 4 in row major order (unlabeled 8-colorings with no clashing color pairs).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =3a(6) =11a(7) =8a(8) =8a(9) =11a(10) =48a(11) =64a(12) =96a(13) =64a(14) =48a(15) =236a(16) =512a(17) =1280a(18) =1280a(19) =512a(20) =236a(21) =1248a(22) =4096a(23) =18432a(24) =28672a(25) =18432a(26) =4096a(27) =1248a(28) =6896a(29) =32768
External references
- oeis: A233168