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A056400 Number of step shifted (decimated) sequence structures using exactly six different symbols. +0
1
0, 0, 0, 0, 0, 1, 4, 83, 454, 5761, 17998, 334797, 777107, 10574995, 52611728, 342199022, 1094122103, 18448004619, 38504610244, 538330833767, 2215487105217, 16330536710131, 45407723468330 (list; graph; listen)
OFFSET

1,7

COMMENT

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

A056395(n)-A056394(n).

CROSSREFS

Cf. A056380.

Sequence in context: A158981 A007154 A056410 this_sequence A119514 A102982 A069441

Adjacent sequences: A056397 A056398 A056399 this_sequence A056401 A056402 A056403

KEYWORD

nonn

AUTHOR

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

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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.


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