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A056402
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Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of three different symbols.
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2
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1, 1, 3, 8, 13, 65, 67, 322, 573, 2495, 2979, 23294, 22217, 133081, 300947, 909050, 1345633, 10766559, 10762819, 72954582, 145362861, 523026545, 713213955, 5893685746, 7060765719, 35303760331
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| See A056371 for an explanation of step shifts. Permuting the symbols will not change the structure.
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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)*A056392(n/d) where d|n.
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CROSSREFS
| Cf. A056382.
Sequence in context: A066809 A009848 A153891 * A106386 A000232 A067789
Adjacent sequences: A056399 A056400 A056401 * A056403 A056404 A056405
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KEYWORD
| nonn
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AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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