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Search: id:A056508
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| A056508 |
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Periodic palindromic structures using exactly two different symbols. |
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+0
1
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| 0, 1, 1, 3, 3, 6, 7, 13, 15, 25, 31, 50, 63, 99, 127, 197
(list; graph; listen)
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OFFSET
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1,4
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COMMENT
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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.
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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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A056503(n)-1.
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CROSSREFS
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Cf. A052551.
Sequence in context: A034401 A088571 A027187 this_sequence A050065 A078477 A098832
Adjacent sequences: A056505 A056506 A056507 this_sequence A056509 A056510 A056511
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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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