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Search: id:A056403
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| A056403 |
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Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of four different symbols. |
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+0
3
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| 1, 1, 3, 9, 16, 102, 130, 800, 1889, 11089, 17598, 179255, 233448, 1865925, 5603767, 22468480, 44744046, 477260541, 636308684, 5732446015, 15272176563, 73301037291, 133274359128, 1466413083360
(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)*A056393(n/d) where d|n.
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CROSSREFS
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Cf. A056383.
Sequence in context: A058538 A117108 A145796 this_sequence A106676 A050795 A050797
Adjacent sequences: A056400 A056401 A056402 this_sequence A056404 A056405 A056406
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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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