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Search: id:A056414
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| A056414 |
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Number of step cyclic shifted sequences using a maximum of six different symbols. |
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+0
5
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| 6, 21, 56, 231, 462, 4291, 6966, 57561, 188866, 1519035, 3302922, 45921281, 83747286, 933081411, 3920355712, 22075451286, 62230996506, 940379310731, 1781757016326, 22856965214727, 87052415641136
(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: A056411 A056412 A056413 this_sequence A056415 A056416 A056417
Sequence in context: A137361 A058484 A074745 this_sequence A056341 A053809 A047520
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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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