T(n,k) = number of n X k 0..5 arrays with no element x(i,j) adjacent to itself or value 5-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order (unlabeled 6-colorings with no clashing color pairs).
A233129
T(n,k) = number of n X k 0..5 arrays with no element x(i,j) adjacent to itself or value 5-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order (unlabeled 6-colorings with no clashing color pairs).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =8a(5) =3a(6) =10a(7) =80a(8) =80a(9) =10a(10) =36a(11) =896a(12) =2688a(13) =896a(14) =36a(15) =136a(16) =10496a(17) =96256a(18) =96256a(19) =10496a(20) =136a(21) =528a(22) =124928a(23) =3497984a(24) =10674176a(25) =3497984a(26) =124928a(27) =528a(28) =2080a(29) =1495040
External references
- oeis: A233129