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A056406
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Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly two different symbols.
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0
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0, 1, 2, 4, 5, 16, 13, 42, 49, 133, 107, 600, 351, 1385, 2164, 4416, 4115, 22043, 14601, 67872, 88360, 209827, 190745, 1074534, 839122, 2796647, 3730532, 11275300, 9587579, 67193198, 35792567
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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. Identical to A056401 for n>1.
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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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