A056370 Number of primitive (period n) bracelet structures using exactly six different colored beads.

0, 0, 0, 0, 0, 1, 3, 27, 171, 1249, 8389, 56078, 360430, 2272598, 14037552, 85516427, 514976658, 3074986236, 18239677629, 107654218055, 632996894925, 3711499485032, 21716765203045, 126880009551584

Offset

1,7

Comments

Turning over will not create a new bracelet. Permuting the colors of the beads will not change the structure.

References

M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2]

Links

Table of n, a(n) for n=1..24.

Formula

A056365(n)-A056364(n).

Crossrefs

Column 6 of A276543.

Cf. A056307.

Sequence in context: A215711 A270956 A129530 * A056361 A141442 A053932

Adjacent sequences: A056367 A056368 A056369 * A056371 A056372 A056373

Keyword

nonn

Author

Marks R. Nester

Status

approved