Array read by antidiagonals: T(n,k) is the number of series-reduced rooted trees with n leaves of k colors.
A319254
Array read by antidiagonals: T(n,k) is the number of series-reduced rooted trees with n leaves of k colors.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =3a(4) =3a(5) =2a(6) =4a(7) =6a(8) =10a(9) =5a(10) =5a(11) =10a(12) =28a(13) =40a(14) =12a(15) =6a(16) =15a(17) =60a(18) =156a(19) =170a(20) =33a(21) =7a(22) =21a(23) =110a(24) =430a(25) =948a(26) =785a(27) =90a(28) =8a(29) =28
External references
- oeis: A319254