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A056386 Number of primitive (aperiodic) step shifted (decimated) sequences using exactly two different symbols. 1
0, 2, 4, 8, 10, 32, 26, 84, 98, 266, 214, 1200, 702, 2770, 4328, 8832, 8230, 44086, 29202, 135744, 176720, 419654, 381490, 2149068, 1678244, 5593294, 7461064, 22550600, 19175158, 134386396, 71585134 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

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.

FORMULA

Sum mu(d)*A056376(n/d) where d divides n.

CROSSREFS

Sequence in context: A124849 A056654 A020950 * A116636 A014425 A028889

Adjacent sequences:  A056383 A056384 A056385 * A056387 A056388 A056389

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 17:48 EST 2012. Contains 205939 sequences.