Irregular triangle read by rows: T(n,k) is the number of binary pattern classes in the (8,n)-rectangular grid with k '1's and (8n-k) '0's: two patterns are in the same class if one of them can be obtained by a reflection or 180-degree rotation of the other.
A228167
Irregular triangle read by rows: T(n,k) is the number of binary pattern classes in the (8,n)-rectangular grid with k '1's and (8n-k) '0's: 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) =16a(4) =28a(5) =38a(6) =28a(7) =16a(8) =4a(9) =1a(10) =1a(11) =4a(12) =36a(13) =140a(14) =476a(15) =1092a(16) =2044a(17) =2860a(18) =3270a(19) =2860a(20) =2044a(21) =1092a(22) =476a(23) =140a(24) =36a(25) =4a(26) =1a(27) =1a(28) =8a(29) =84
External references
- oeis: A228167