Number of chiral pairs of color patterns (set partitions) in a row of length n using exactly 6 colors (subsets).

A320529

Number of chiral pairs of color patterns (set partitions) in a row of length n using exactly 6 colors (subsets).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =9a(7) =124a(8) =1300a(9) =11316a(10) =89513a(11) =660978a(12) =4658738a(13) =31711638a(14) =210332227a(15) =1367416232a(16) =8752773288a(17) =55343303064a(18) =346540112781

External references