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A056405
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Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of six different symbols.
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1
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1, 1, 3, 9, 17, 112, 160, 1182, 3526, 27550, 60332, 863283, 1636608, 19121869, 84580104, 501914374, 1492170608, 23751681540, 47340359590, 637742792823, 2546703019081, 18317620779149, 49923584451714
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listen;
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OFFSET
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1,3
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COMMENTS
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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. [See A056391 for pdf file of Chap. 2]
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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