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Search: id:A056511
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| A056511 |
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Number of periodic palindromic structures using exactly five different symbols. |
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+0
2
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| 0, 0, 0, 0, 0, 0, 0, 1, 1, 10, 15, 85, 140, 618, 1050, 4065
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OFFSET
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1,10
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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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A056506(n)-A056505(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.
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CROSSREFS
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Cf. A056474.
Sequence in context: A035407 A020139 A056522 this_sequence A166626 A114703 A134515
Adjacent sequences: A056508 A056509 A056510 this_sequence A056512 A056513 A056514
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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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