Triangle read by rows: T(n,m) is the number of binary pattern classes in the (n,m)-rectangular grid with half 1's and half 0's: two patterns are in same class if one can be obtained by a reflection or 180-degree rotation of the other (ordered occurrences rounded up/down if m*n is odd).
A283435
Triangle read by rows: T(n,m) is the number of binary pattern classes in the (n,m)-rectangular grid with half 1's and half 0's: two patterns are in same class if one can be obtained by a reflection or 180-degree rotation of the other (ordered occurrences rounded up/down if m*n is odd).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =1a(7) =2a(8) =6a(9) =39a(10) =1a(11) =4a(12) =22a(13) =252a(14) =3270a(15) =1a(16) =6a(17) =66a(18) =1675a(19) =46448a(20) =1302196a(21) =1a(22) =10a(23) =246a(24) =12300a(25) =676732a(26) =38786376a(27) =2268820290a(28) =1a(29) =19
External references
- oeis: A283435