A056271 Number of primitive (aperiodic) words of length n which contain exactly six different symbols.

0, 0, 0, 0, 0, 720, 15120, 191520, 1905120, 16435440, 129230640, 953028720, 6711344640, 45674173440, 302899156560, 1969146930240, 12604139926560, 79694818842240, 499018753280880, 3100376788241040

Offset: 1

Author

Marks R. Nester

Keywords

• nonn

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]

Crossrefs

Cf. A000400, A000920, A054721.

Formula

Sum mu(d)*A000920(n/d) where d|n.