A056386 - OEIS

A056386

Number of primitive (aperiodic) step shifted (decimated) sequences using exactly two different symbols.

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

LINKS

Table of n, a(n) for n=1..31.

FORMULA

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

CROSSREFS

Sequence in context: A365002 A370663 A020950 * A331027 A210108 A217131

Adjacent sequences: A056383 A056384 A056385 * A056387 A056388 A056389

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved