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Search: id:A056428
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| A056428 |
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Number of primitive (period n) step cyclic shifted sequences using exactly six different symbols. |
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+0
2
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| 0, 0, 0, 0, 0, 60, 360, 6030, 35280, 410976, 1174896, 19948140, 43022700, 543757500, 2524673904, 15399112410, 46338868800, 737917430820, 1459120076400, 19381180579776, 75959665269480, 534453891382764
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OFFSET
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1,6
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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)*A056419(n/d) where d|n.
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CROSSREFS
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Cf. A056423.
Sequence in context: A092478 A024184 A119631 this_sequence A056419 A060489 A088942
Adjacent sequences: A056425 A056426 A056427 this_sequence A056429 A056430 A056431
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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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