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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. [See A056391 for pdf file of Chap. 2]

LINKS

Table of n, a(n) for n=1..19.

FORMULA

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

CROSSREFS

Sequence in context: A346174 A182349 A215225 * A266945 A073970 A074009

Adjacent sequences: A056382 A056383 A056384 * A056386 A056387 A056388

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved

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Last modified November 29 11:57 EST 2022. Contains 358424 sequences. (Running on oeis4.)