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A056512
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Periodic palindromic structures using exactly six different symbols.
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1
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0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 13, 21, 154, 266
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,12
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REFERENCES
| M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
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FORMULA
| A056507(n)-A056506(n).
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EXAMPLE
| 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
| Cf. A056475.
Sequence in context: A147435 A203854 * A056523 A158998 A122559 A132131
Adjacent sequences: A056509 A056510 A056511 * A056513 A056514 A056515
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KEYWORD
| nonn
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AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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