A056467 Number of primitive (aperiodic) palindromes using exactly six different symbols.

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

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