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A014254
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Liponombres: numbers whose French name does not contain the letter "e".
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6
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1, 3, 5, 6, 8, 10, 18, 20, 23, 25, 26, 28, 1000000, 1000001, 1000003, 1000005, 1000006, 1000008, 1000010, 1000018, 1000020, 1000023, 1000025, 1000026, 1000028, 3000000, 3000001, 3000003, 3000005, 3000006, 3000008, 3000010
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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In French also called: les nombres "évites" ou "apparés".
Could also be called les nombres "epers". - Benoit Cloitre, May 05 2003
French version of eban numbers (A006933): no "e" in name of number in French - "e" perd ("e" lost)!
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REFERENCES
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Georges Perec, La disparition, Editions Gallimard, Paris, 1969; English translation: A Void, Harvill, 1994. (A novel that does does not use the letter "e". These numbers are not mentioned, however.)
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LINKS
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Table of n, a(n) for n=1..32.
N. Graner, Liponombres
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EXAMPLE
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a(1) = 1 ("un"), a(2) = 3 ("trois", not "dEux")
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PROG
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(PARI) is_A014254(n)=!setsearch(Set(Vec(French(n))), "e") \\ See A167507 for French(). - M. F. Hasler, Nov 11 2015
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CROSSREFS
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Cf. A006933, A050280; A167507, A139212, A007005, A139121, A233185.
Sequence in context: A304435 A084810 A268896 * A131422 A301744 A087720
Adjacent sequences: A014251 A014252 A014253 * A014255 A014256 A014257
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KEYWORD
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nonn,word,fini
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AUTHOR
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Olivier Gérard
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EXTENSIONS
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Additional comments from Bruno Salvy (Bruno.Salvy(AT)inria.fr) and Nicolas Graner (Nicolas.Graner(AT)cri.u-psud.fr), May 11 2003
Corrected by Don Reble, Nov 19 2006
Edited by M. F. Hasler, Nov 11 2015
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STATUS
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approved
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