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Search: id:A056523
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| A056523 |
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Number of primitive (period n) periodic palindromic structures using exactly six different symbols. |
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+0
1
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| 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 13, 21, 154, 266
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OFFSET
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1,12
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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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A056517(n)-A056516(n).
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EXAMPLE
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For example, aaabbb is not a (finite) palindrome but it is a periodic palindrome. Permuting the symbols will not change the structure. This should be different from A056512.
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CROSSREFS
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Cf. A056485.
Sequence in context: A066630 A147435 A056512 this_sequence A158998 A122559 A132131
Adjacent sequences: A056520 A056521 A056522 this_sequence A056524 A056525 A056526
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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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