T(n,k)=Number of nXk 0..5 arrays with no element x(i,j) adjacent to itself or value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order (unlabelled 6-colorings with no clashing color pairs).
A233256
T(n,k)=Number of nXk 0..5 arrays with no element x(i,j) adjacent to itself or value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order (unlabelled 6-colorings with no clashing color pairs).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =3a(4) =10a(5) =11a(6) =10a(7) =104a(8) =136a(9) =48a(10) =36a(11) =1184a(12) =4672a(13) =2080a(14) =236a(15) =136a(16) =13952a(17) =166400a(18) =221696a(19) =32896a(20) =1248a(21) =528a(22) =166400a(23) =6049792a(24) =23896064a(25) =10620928a(26) =524800a(27) =6896a(28) =2080a(29) =1992704
External references
- oeis: A233256