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A056466 Number of primitive (aperiodic) palindromes using exactly five different symbols. 4
0, 0, 0, 0, 0, 0, 0, 0, 120, 120, 1800, 1800, 16800, 16800, 126000, 126000, 834120, 834000, 5103000, 5102880, 29607600, 29605800, 165528000, 165526200, 901020120, 901003320, 4809004080, 4808987400, 25292030400, 25291904280, 131542866000, 131542740000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

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)*A056456(n/d).

CROSSREFS

Column 5 of A327873.

Cf. A056456, A056461.

Sequence in context: A244950 A174149 A268920 * A056456 A239535 A085218

Adjacent sequences:  A056463 A056464 A056465 * A056467 A056468 A056469

KEYWORD

nonn

AUTHOR

Marks R. Nester

EXTENSIONS

Terms a(30) and beyond from Andrew Howroyd, Sep 29 2019

STATUS

approved

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Last modified October 23 03:21 EDT 2019. Contains 328335 sequences. (Running on oeis4.)