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2, 4, 8, 14, 25, 41, 74, 124, 222, 390, 706, 1262, 2324, 4244, 7869, 14607, 27337, 51243, 96665, 182666, 346647, 659206, 1257287, 2402569, 4601771, 8828741, 16969511, 32665154, 62972932
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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This is the number of binary sequences of length n that are not 3-divided. The number that are not 2-divided turned out, surprisingly, to be A000031, so this also seems worth including.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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