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A056385 Number of primitive (aperiodic) step shifted (decimated) sequences using a maximum of six different symbols. 1
6, 30, 120, 720, 2010, 23820, 46950, 434700, 1683450, 15126810, 36284466, 547180200, 1088416050, 13060942950, 58782162480, 352913410080, 1057916846190, 16926687985950, 33853322280030 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A056371 for an explanation of step shifts.

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..19.

FORMULA

sum mu(d)*A056375(n/d) where d|n.

CROSSREFS

Sequence in context: A055281 A182349 A215225 * A073970 A074009 A002446

Adjacent sequences:  A056382 A056383 A056384 * A056386 A056387 A056388

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified May 22 17:20 EDT 2013. Contains 225559 sequences.