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Search: id:A056411
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| A056411 |
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Number of step cyclic shifted sequences using a maximum of three different symbols. |
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+0
8
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| 3, 6, 10, 21, 24, 92, 78, 327, 443, 1632, 1698, 12769, 10464, 57840, 122822, 348222, 476052, 3597442, 3401970, 22006959, 41597374, 142677588, 186077886, 1476697627, 1694658003, 8147282460, 15690973754
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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See A056371 for an explanation of step shifts. Under step cyclic shifts, abcde, bdace, bcdea, cdeab and daceb etc. are equivalent.
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REFERENCES
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M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
R. C. Titsworth, (1964). Equivalence classes of periodic sequences. Illinois J. Math. 8: 266-270.
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FORMULA
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Refer to Titsworth or slight "simplification" in Nester.
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CROSSREFS
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Cf. A002729.
Adjacent sequences: A056408 A056409 A056410 this_sequence A056412 A056413 A056414
Sequence in context: A122628 A068865 A060179 this_sequence A068855 A068882 A076713
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KEYWORD
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nonn
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AUTHOR
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Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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