A056270 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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: A340580 A376375 A053567 * A001118 A375773 A373940

Adjacent sequences: A056267 A056268 A056269 * A056271 A056272 A056273

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved