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Search: id:A056443
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| A056443 |
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Number of primitive (period n) step cyclic shifted sequence structures using a maximum of six different symbols. |
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+0
2
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| 1, 1, 2, 5, 7, 33, 35, 212, 449, 2991, 5651, 74919, 126757, 1370979, 5653844, 31440622, 87796361, 1319721998, 2491714133, 31893714060, 121274777190, 832622957033, 2170594048581, 34308978905916
(list; graph; listen)
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OFFSET
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1,3
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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. Permuting the symbols will not change the structure.
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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.
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FORMULA
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sum mu(d)*A056433(n/d) where d|n.
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CROSSREFS
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Cf. A056423.
Sequence in context: A082013 A083777 A056442 this_sequence A042931 A085394 A041875
Adjacent sequences: A056440 A056441 A056442 this_sequence A056444 A056445 A056446
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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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