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A056387 Number of primitive (aperiodic) step shifted (decimated) sequences using exactly three different symbols. 1
0, 0, 3, 21, 39, 285, 309, 1638, 3099, 14109, 17157, 135918, 130995, 789819, 1791447, 5425938, 8047839, 64463793, 64486017, 437310162, 871626729, 3136882659, 4278115101, 35355495078, 42359479599 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

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)*A056377(n/d) where d|n.

CROSSREFS

Sequence in context: A076169 A298035 A178082 * A056377 A146712 A318549

Adjacent sequences:  A056384 A056385 A056386 * A056388 A056389 A056390

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved

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Last modified October 5 06:51 EDT 2022. Contains 357252 sequences. (Running on oeis4.)