Triangle read by rows: T(n,k) is the number of non-isomorphic colorings of a toroidal n X k grid using exactly three colors under translational symmetry, 1 <= k <= n.
A294685
Triangle read by rows: T(n,k) is the number of non-isomorphic colorings of a toroidal n X k grid using exactly three colors under translational symmetry, 1 <= k <= n.
Terms
- a(0) =0a(1) =0a(2) =9a(3) =2a(4) =91a(5) =2022a(6) =9a(7) =738a(8) =43315a(9) =2679246a(10) =30a(11) =5613a(12) =950062a(13) =174184755a(14) =33887517990a(15) =91a(16) =43404a(17) =21480921a(18) =11765865678a(21) =258a(22) =338259a(23) =497812638a(24) =816999710223a(28) =729a(29) =2679228a(30) =11765822365
External references
- oeis: A294685