We have one bead labeled i for every i=1, 2, ...; a(n) = number of necklaces that can be made using any subset of the first n beads.

A116723

We have one bead labeled i for every i=1, 2, ...; a(n) = number of necklaces that can be made using any subset of the first n beads.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =8a(4) =18a(5) =53a(6) =219a(7) =1201a(8) =8055a(9) =62860a(10) =556070a(11) =5488126a(12) =59740688a(13) =710771367a(14) =9174170117a(15) =127661752527

External references