Triangle read by rows: T(n,k) = number of reversible string structures of length n using exactly k different symbols.
A284949
Triangle read by rows: T(n,k) = number of reversible string structures of length n using exactly k different symbols.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =5a(8) =4a(9) =1a(10) =1a(11) =9a(12) =15a(13) =6a(14) =1a(15) =1a(16) =19a(17) =50a(18) =37a(19) =9a(20) =1a(21) =1a(22) =35a(23) =160a(24) =183a(25) =76a(26) =12a(27) =1a(28) =1a(29) =71
External references
- oeis: A284949