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Search: id:A139212
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| A139212 |
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Form a sequence of French words as follows: look to the left, towards the beginning of the sequence and write down the number of vowels you see; repeat; then replace the words by the corresponding numbers. |
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+0
4
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OFFSET
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0,2
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COMMENT
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The sequence of words is: zero, deux, quatre, sept, huit, dix, onze, treize, seize, ...
Hyphens, accents and spaces are not counted.
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REFERENCES
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E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.
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EXAMPLE
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The second word is "our" (and so a(2)=2), because at the end of the first word we can see two vowels (the vowels in "zero") to the left.
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CROSSREFS
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For an English version see A139282.
Sequence in context: A132604 A013153 A075663 this_sequence A127875 A056231 A131346
Adjacent sequences: A139209 A139210 A139211 this_sequence A139213 A139214 A139215
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KEYWORD
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nonn,word,easy,more
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com) (based on Angelini's article), Jun 08 2008
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