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Search: id:A056427
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| A056427 |
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Number of primitive (period n) step cyclic shifted sequences using exactly five different symbols. |
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+0
2
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| 0, 0, 0, 0, 6, 150, 400, 4080, 15480, 127812, 269340, 3493530, 5777190, 57262050, 210945176, 1030384035, 2493913170, 32176432430, 51785999300, 562228198086, 1805427491520, 10438821574410, 22865672706000
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OFFSET
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1,5
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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.
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FORMULA
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sum mu(d)*A056418(n/d) where d|n.
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CROSSREFS
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Cf. A056422.
Sequence in context: A065986 A012791 A089480 this_sequence A056418 A070025 A065946
Adjacent sequences: A056424 A056425 A056426 this_sequence A056428 A056429 A056430
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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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