Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 8 colors and n>=m, two patterns are in the same class if one of them can be obtained by a reflection or 180-degree rotation of the other.
A286919
Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 8 colors and n>=m, two patterns are in the same class if one of them can be obtained by a reflection or 180-degree rotation of the other.
Terms
- a(0) =1a(1) =1a(2) =8a(3) =1a(4) =36a(5) =1072a(6) =1a(7) =288a(8) =66816a(9) =33693696a(10) =1a(11) =2080a(12) =4197376a(13) =17184194560a(15) =1a(16) =16640a(17) =268517376a(21) =1a(22) =131328a(23) =17180065792
External references
- oeis: A286919