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Search: id:A007055
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| A007055 |
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Number of words of length n in a certain language.
(Formerly M1124)
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+0
1
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| 1, 2, 4, 8, 16, 32, 52, 100, 160, 260, 424
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
R. Kemp, On the number of words in the language {w in Sigma* | w = w^R }^2, Discrete Math., 40 (1982), 225-234.
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CROSSREFS
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Sequence in context: A133408 A101434 A008382 this_sequence A072207 A033860 A115909
Adjacent sequences: A007052 A007053 A007054 this_sequence A007056 A007057 A007058
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein, R. Kemp
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