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A056467 Number of primitive (aperiodic) palindromes using exactly six different symbols. 4
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 720, 720, 15120, 15120, 191520, 191520, 1905120, 1905120, 16435440, 16435440, 129230640, 129229920, 953029440, 953028720, 6711344640, 6711329520, 45674188560, 45674173440, 302899156560, 302898965040, 1969147121760, 1969146930240 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

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

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

FORMULA

a(n) = Sum_{d|n} mu(d)*A056457(n/d).

CROSSREFS

Column 6 of A327873.

Cf. A056457, A056462.

Sequence in context: A267746 A267026 A145226 * A056457 A068351 A067892

Adjacent sequences:  A056464 A056465 A056466 * A056468 A056469 A056470

KEYWORD

nonn

AUTHOR

Marks R. Nester

EXTENSIONS

Terms a(28) and beyond from Andrew Howroyd, Sep 29 2019

STATUS

approved

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Last modified October 22 00:52 EDT 2019. Contains 328315 sequences. (Running on oeis4.)