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A056409 Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly five different symbols. 0
0, 0, 0, 0, 1, 9, 26, 299, 1183, 10700, 24736, 349232, 626053, 6680953, 26364609, 137246955, 353304459, 4826416835, 8199440662, 93679518802, 315943737305, 1913783049725, 4382586624256, 60629067426943 (list; graph; refs; listen; history; internal format)
OFFSET

1,6

COMMENTS

See A056371 for an explanation of step shifts. Permuting the symbols will not change the structure.

REFERENCES

M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.

FORMULA

A056404(n)-A056403(n).

CROSSREFS

Cf. A056389.

Sequence in context: A048771 A055849 A084813 * A056399 A135864 A074954

Adjacent sequences:  A056406 A056407 A056408 * A056410 A056411 A056412

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 18:15 EST 2012. Contains 205835 sequences.