Number of primitive (period n) n-bead bracelet structures which are not periodic palindromes using exactly four different colored beads.
A328039
Number of primitive (period n) n-bead bracelet structures which are not periodic palindromes using exactly four different colored beads.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =10a(6) =32a(7) =129a(8) =468a(9) =1806a(10) =6780a(11) =25917a(12) =98056a(13) =372919a(14) =1414548a(15) =5375974a(16) =20432480a(17) =77773845a(18) =296350460a(19) =1130919576a(20) =4321818986a(21) =16540888897a(22) =63399449652a(23) =243357204415a(24) =935428588930
External references
- oeis: A328039