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Search: id:A056498
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| A056498 |
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Number of primitive (period n) periodic palindromes using exactly two different symbols. |
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+0
1
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| 0, 1, 2, 3, 6, 7, 14, 18, 28, 39, 62, 81, 126, 175, 246, 360, 510, 728, 1022, 1485, 2030, 3007, 4094, 6030, 8184, 12159, 16352, 24381, 32766, 48849, 65534
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OFFSET
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1,3
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COMMENT
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For example, aaabbb is not a (finite) palindrome but it is a periodic palindrome.
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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)*A027383(n/d-2) where d divides n and assuming that A027383(-1)=0.
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CROSSREFS
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Cf. A056463.
Sequence in context: A018606 A117087 A000837 this_sequence A018652 A125686 A018748
Adjacent sequences: A056495 A056496 A056497 this_sequence A056499 A056500 A056501
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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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