Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 4 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.
A283433
Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 4 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) =4a(3) =1a(4) =10a(5) =76a(6) =1a(7) =40a(8) =1120a(9) =67840a(10) =1a(11) =136a(12) =16576a(13) =4212736a(14) =1073790976a(15) =1a(16) =544a(17) =263680a(18) =268779520a(19) =274882625536a(21) =1a(22) =2080a(23) =4197376a(24) =17184194560
External references
- oeis: A283433