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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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2
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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; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| 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
| M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
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FORMULA
| Use de Bruijn's generalization of Polya's enumeration theorem as discussed in reference.
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CROSSREFS
| Cf. A056414.
Sequence in context: A112994 A056036 A056432 * A064669 A068342 A038034
Adjacent sequences: A056430 A056431 A056432 * A056434 A056435 A056436
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KEYWORD
| nonn
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AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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