Number of chiral pairs of color patterns (set partitions) in a cycle of length n.

A320749

Number of chiral pairs of color patterns (set partitions) in a cycle of length n.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =6a(6) =34a(7) =190a(8) =1011a(9) =5352a(10) =29740a(11) =172466a(12) =1055232a(13) =6793791a(14) =46034940a(15) =327303819a(16) =2436650368a(17) =18944771253a(18) =153488081102

External references