Number of primitive (period n) n-bead necklace structures using a maximum of five different colored beads.

A056301

Number of primitive (period n) n-bead necklace structures using a maximum of five different colored beads.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =11a(5) =38a(6) =122a(7) =496a(8) =2005a(9) =8707a(10) =38364a(11) =173562a(12) =792827a(13) =3662800a(14) =17034367a(15) =79702578a(16) =374624253a(17) =1767881397a(18) =8370666416a(19) =39751064122a(20) =189262621739a(21) =903220020390

External references