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, diagonally 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).
A233174
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, diagonally 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) =8a(5) =11a(6) =10a(7) =80a(8) =80a(9) =48a(10) =36a(11) =800a(12) =2688a(13) =896a(14) =236a(15) =136a(16) =8576a(17) =78336a(18) =96256a(19) =10496a(20) =1248a(21) =528a(22) =92672a(23) =2469888a(24) =7938048a(25) =3497984a(26) =124928a(27) =6896a(28) =2080a(29) =1009664
External references
- oeis: A233174