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A074030
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Number of binary Lyndon words of length n with trace 1 and subtrace 1 over Z_2.
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7
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0, 0, 0, 1, 2, 3, 5, 8, 13, 24, 45, 85, 160, 297, 550, 1024, 1920, 3626, 6885, 13107, 24989, 47709, 91225, 174760, 335462, 645120, 1242600, 2396745, 4628480, 8948385, 17318945, 33554432, 65074253, 126320640, 245424829, 477218560, 928645120, 1808414181, 3524082400
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OFFSET
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1,5
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COMMENTS
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Same as the number of binary Lyndon words of length n with trace 1 and subtrace 1 over GF(2).
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LINKS
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FORMULA
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a(2n) = A042981(2n), a(2n+1) = A042982(2n+1). This follows from Cattell et al. (see A042979), Main Theorem on p. 33 and Theorem 4 on p. 44.
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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