A056270 Number of primitive (aperiodic) words of length n which contain exactly five different symbols.

0, 0, 0, 0, 120, 1800, 16800, 126000, 834120, 5102880, 29607600, 165526200, 901020120, 4808987400, 25292030280, 131542740000, 678330198120, 3474970629480, 17710714165200, 89904725757000

Offset

1,5

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..20.

Formula

Sum mu(d)*A001118(n/d) where d|n.

Crossrefs

Cf. A000351, A001118, A054720.

Sequence in context: A282899 A340580 A053567 * A001118 A354230 A354232

Adjacent sequences: A056267 A056268 A056269 * A056271 A056272 A056273

Keyword

nonn

Author

Marks R. Nester

Status

approved