Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 6 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.
A286893
Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 6 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) =6a(3) =1a(4) =21a(5) =351a(6) =1a(7) =126a(8) =12096a(9) =2544696a(10) =1a(11) =666a(12) =420876a(13) =544638816a(14) =705278736576a(15) =1a(16) =3996a(17) =15132096a(18) =117564302016a(21) =1a(22) =23436a(23) =544230576
External references
- oeis: A286893