Number of primitive (period n) bracelet structures using exactly five different colored beads.

A056369

Number of primitive (period n) bracelet structures using exactly five different colored beads.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =3a(6) =16a(7) =85a(8) =434a(9) =2270a(10) =11530a(11) =58397a(12) =290689a(13) =1436669a(14) =7036417a(15) =34286379a(16) =166316979a(17) =804556969a(18) =3884248150a(19) =18731031687a(20) =90269841908a(21) =434955103451

External references