Number of bracelet structures using exactly six different colored beads.
A056361
Number of bracelet structures using exactly six different colored beads.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =3a(7) =27a(8) =171a(9) =1249a(10) =8389a(11) =56079a(12) =360430a(13) =2272601a(14) =14037552a(15) =85516454a(16) =514976658a(17) =3074986408a(18) =18239677629a(19) =107654219304a(20) =632996894928
External references
- oeis: A056361