A328039 Number of primitive (period n) n-bead bracelet structures which are not periodic palindromes using exactly four different colored beads.

0, 0, 0, 1, 2, 10, 32, 129, 468, 1806, 6780, 25917, 98056, 372919, 1414548, 5375974, 20432480, 77773845, 296350460, 1130919576, 4321818986, 16540888897, 63399449652, 243357204415, 935428588930, 3600514267686, 13876474860110, 53546226302319, 206864885150216

Offset

1,5

Comments

Permuting the colors of the beads will not change the structure.

Links

Andrew Howroyd, Table of n, a(n) for n = 1..200

Formula

a(n) = A056368(n) - A056521(n).

Crossrefs

Column 4 of A309784.

Cf. A056368, A056521, A328035, A328038, A328658.

Sequence in context: A265836 A083099 A032095 * A264960 A151019 A329427

Adjacent sequences: A328036 A328037 A328038 * A328040 A328041 A328042

Keyword

nonn

Author

Andrew Howroyd, Oct 02 2019

Status

approved