A056382 - OEIS

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A056382

Number of primitive (aperiodic) step shifted (decimated) sequences using a maximum of three different symbols.

3, 6, 15, 45, 69, 381, 387, 1890, 3393, 14907, 17799, 139518, 133101, 798129, 1804431, 5452434, 8072529, 64596051, 64573623, 437717394, 872156889, 3138141621, 4279259571, 35361942282, 42364514331

(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..25.

FORMULA

Sum mu(d)*A056372(n/d) where d|n.

CROSSREFS

Sequence in context: A067771 A289678 A337326 * A028401 A005655 A277063

Adjacent sequences: A056379 A056380 A056381 * A056383 A056384 A056385

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved