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Search: id:A056433
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| A056433 |
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Step cyclic shifted sequence structures using a maximum of six different symbols. |
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+0
3
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| 1, 2, 3, 7, 8, 37, 36, 219, 452, 3000, 5652, 74961, 126758, 1371016, 5653854, 31440841, 87796362, 1319722484, 2491714134, 31893717065, 121274777228, 832622962686, 2170594048582, 34308978981089
(list; graph; listen)
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OFFSET
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1,2
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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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Use de Bruijn's generalization of Polya's enumeration theorem as discussed in reference.
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CROSSREFS
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Cf. A056414.
Adjacent sequences: A056430 A056431 A056432 this_sequence A056434 A056435 A056436
Sequence in context: A112994 A056036 A056432 this_sequence A064669 A068342 A038034
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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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