Regular triangle where T(n,k) is the number of inequivalent colorings of free pure symmetric multifunctions (with empty expressions allowed) with n positions and k leaves.
A304485
Regular triangle where T(n,k) is the number of inequivalent colorings of free pure symmetric multifunctions (with empty expressions allowed) with n positions and k leaves.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =2a(5) =0a(6) =1a(7) =6a(8) =4a(9) =0a(10) =1a(11) =12a(12) =23a(13) =7a(14) =0a(15) =1a(16) =20a(17) =81a(18) =73a(19) =12a(20) =0a(21) =1a(22) =30a(23) =209a(24) =407a(25) =206a(26) =19a(27) =0a(28) =1a(29) =42
External references
- oeis: A304485