A056462 Number of primitive (aperiodic) palindromes using a maximum of six different symbols.

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, 13060414080, 78364156320, 78363884130, 470184984570, 470183297220

Offset

1,1

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

Table of n, a(n) for n=1..30.

Formula

a(n) = Sum_{d|n} mu(d)*A056452(n/d).

Prog

(PARI) a(n) = sumdiv(n, d, moebius(d)*6^((1 + n/d)\2));
for(n=1, 32, print1(a(n), ", ")); \\ Petros Hadjicostas, Apr 24 2020

Crossrefs

Cf. A056391, A056452.

Column 6 of A284823.

Sequence in context: A287470 A138704 A005396 * A249869 A209446 A047762

Adjacent sequences: A056459 A056460 A056461 * A056463 A056464 A056465

Keyword

nonn

Author

Marks R. Nester

Extensions

More terms from Petros Hadjicostas, Apr 24 2020

Status

approved