Number of chiral pairs of color patterns (set partitions) in a row of length n using exactly 5 colors (subsets).

A320528

Number of chiral pairs of color patterns (set partitions) in a row of length n using exactly 5 colors (subsets).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =6a(6) =64a(7) =508a(8) =3428a(9) =21132a(10) =123050a(11) =688850a(12) =3752350a(13) =20032446a(14) =105372624a(15) =548066568a(16) =2826316248a(17) =14478890712a(18) =73794322750a(19) =374602205590

External references