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Search: id:A056404
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| A056404 |
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Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of five different symbols. |
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3
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| 1, 1, 3, 9, 17, 111, 156, 1099, 3072, 21789, 42334, 528487, 859501, 8546878, 31968376, 159715435, 398048505, 5303677376, 8835749346, 99411964817, 331215913868, 1987084087016, 4515860983384, 62095480510303
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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See A056371 for an explanation of step shifts. Permuting the symbols will not change the structure.
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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)*A056394(n/d) where d|n.
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CROSSREFS
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Cf. A056384.
Sequence in context: A108050 A009211 A105538 this_sequence A056405 A009216 A103072
Adjacent sequences: A056401 A056402 A056403 this_sequence A056405 A056406 A056407
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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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