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Search: id:A056476
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| A056476 |
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Number of primitive (aperiodic) palindromic structures using a maximum of two different symbols. |
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4
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| 1, 0, 1, 1, 3, 2, 7, 6, 14, 12, 31, 27, 63, 56, 123, 120, 255, 238, 511, 495, 1015, 992, 2047, 2010, 4092, 4032, 8176, 8127, 16383, 16242, 32767
(list; graph; listen)
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OFFSET
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1,5
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COMMENT
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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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Sum mu(d)*A016116(n/d-1) where d|n.
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CROSSREFS
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Cf. A056458.
Sequence in context: A058646 A125718 A014841 this_sequence A056481 A082824 A088657
Adjacent sequences: A056473 A056474 A056475 this_sequence A056477 A056478 A056479
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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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