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A056467 Number of primitive (aperiodic) palindromes using exactly six different symbols. 2
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 (list; graph; refs; listen; history; internal format)
OFFSET

1,11

REFERENCES

M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.

FORMULA

Sum mu(d)*A056457(n/d) where d|n.

CROSSREFS

Cf. A056462.

Sequence in context: A139195 A167984 A145226 * A056457 A068351 A067892

Adjacent sequences:  A056464 A056465 A056466 * A056468 A056469 A056470

KEYWORD

nonn

AUTHOR

Marks R. Nester (nesterm(AT)dpi.qld.gov.au)

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Last modified February 15 13:31 EST 2012. Contains 205802 sequences.