Number of chiral pairs of color patterns (set partitions) in a cycle of length n using 6 or fewer colors (subsets).

A320746

Number of chiral pairs of color patterns (set partitions) in a cycle of length n using 6 or fewer colors (subsets).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =6a(6) =34a(7) =190a(8) =996a(9) =5070a(10) =26454a(11) =139484a(12) =749742a(13) =4082481a(14) =22509626a(15) =125231540a(16) =702004040a(17) =3958071545a(18) =22423227634a(19) =127524417922a(20) =727617119592

External references