Number of primitive (period n) bracelet structures using a maximum of six different colored beads.

A056365

Number of primitive (period n) bracelet structures using a maximum of six different colored beads.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =11a(6) =33a(7) =91a(8) =342a(9) =1305a(10) =5940a(11) =28227a(12) =144545a(13) =760109a(14) =4112455a(15) =22571026a(16) =125410006a(17) =702370207a(18) =3959138462a(19) =22425417823a(20) =127530807883a(21) =727630240442

External references