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A003000 Number of "bifix-free" words of length n over a two-letter alphabet.
(Formerly M0328)
+0
12
1, 2, 2, 4, 6, 12, 20, 40, 74, 148, 284, 568, 1116, 2232, 4424, 8848, 17622, 35244, 70340, 140680, 281076, 562152, 1123736, 2247472, 4493828, 8987656, 17973080, 35946160, 71887896, 143775792, 287542736, 575085472, 1150153322, 2300306644 (list; graph; listen)
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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.


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