A056383 - OEIS

A056383

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

4, 12, 36, 144, 276, 2124, 2796, 17760, 44184, 263004, 419868, 4278000, 5593996, 44748804, 134390724, 539036160, 1073758356, 11453725416, 15271054956, 137575549680, 366528035564, 1759219864020, 3198580043436

(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..23.

FORMULA

a(n) = Sum_{d|n} mu(d)*A056373(n/d).

CROSSREFS

Cf. A056371, A056373.

Sequence in context: A331717 A192010 A252697 * A293857 A052643 A140123

Adjacent sequences: A056380 A056381 A056382 * A056384 A056385 A056386

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved