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A056423
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Number of primitive (period n) step cyclic shifted sequences using a maximum of six different symbols.
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2
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6, 15, 50, 210, 456, 4220, 6960, 57330, 188810, 1518558, 3302916, 45916780, 83747280, 933074430, 3920355200, 22075393725, 62230996500, 940379117630, 1781757016320, 22856963695482, 87052415634120
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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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.
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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
| sum mu(d)*A056414(n/d) where d|n.
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CROSSREFS
| Sequence in context: A095122 A082637 A106272 * A056347 A122365 A119132
Adjacent sequences: A056420 A056421 A056422 * A056424 A056425 A056426
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KEYWORD
| nonn
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AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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