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Search: id:A056502
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| A056502 |
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Number of primitive (period n) periodic palindromes using exactly six different symbols. |
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+0
1
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| 0, 0, 0, 0, 0, 0, 0, 0, 0, 360, 720, 7920, 15120, 103320, 191520, 1048320, 1905120, 9170280, 16435440, 72832680, 129230640, 541129320, 953029440, 3832179120, 6711344640, 26192751480, 45674188560
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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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Sum mu(d)*A056492(n/d) where d|n.
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EXAMPLE
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For example, aaabbb is not a (finite) palindrome but it is a periodic palindrome.
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CROSSREFS
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Cf. A056467.
Sequence in context: A063067 A076205 A048978 this_sequence A056492 A112536 A140801
Adjacent sequences: A056499 A056500 A056501 this_sequence A056503 A056504 A056505
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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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