A056462 - OEIS

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

(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. [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 A375237

Adjacent sequences: A056459 A056460 A056461 * A056463 A056464 A056465