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A056401
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Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of two different symbols.
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2
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1, 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
(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)*A056391(n/d) where d divides n.
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CROSSREFS
| Cf. A056381.
Sequence in context: A178436 A071316 * A056406 A070917 A038757 A062549
Adjacent sequences: A056398 A056399 A056400 * A056402 A056403 A056404
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KEYWORD
| nonn
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AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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