login
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
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
FORMULA
a(n) = Sum_{d|n} mu(d)*A056457(n/d).
CROSSREFS
Column 6 of A327873.
Sequence in context: A267746 A267026 A145226 * A056457 A068351 A067892
KEYWORD
nonn
EXTENSIONS
Terms a(28) and beyond from Andrew Howroyd, Sep 29 2019
STATUS
approved