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A056462 Number of primitive (aperiodic) palindromes using a maximum of six different symbols. 3
6, 0, 30, 30, 210, 180, 1290, 1260, 7740, 7560, 46650, 46410, 279930, 278640, 1679370, 1678320, 10077690, 10069740, 60466170, 60458370, 362795730, 362750400, 2176782330, 2176734420, 13060693800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

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

LINKS

Table of n, a(n) for n=1..25.

FORMULA

sum mu(d)*A056452(n/d) where d|n.

CROSSREFS

Sequence in context: A028849 A138704 A005396 * A209446 A047762 A186977

Adjacent sequences:  A056459 A056460 A056461 * A056463 A056464 A056465

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified May 20 01:19 EDT 2013. Contains 225445 sequences.