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A014254 Liponombres: numbers whose French name does not contain the letter "e". 4
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)
OFFSET

1,2

COMMENTS

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)!

REFERENCES

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.)

LINKS

Table of n, a(n) for n=1..32.

N. Graner, Liponombres

EXAMPLE

a(1) = 1 ("un"), a(2) = 3 ("trois", not "dEux")

PROG

(PARI) is_A014254(n)=!setsearch(Set(Vec(French(n))), "e") \\ See A167507 for French(). - M. F. Hasler, Nov 11 2015

CROSSREFS

Cf. A006933, A050280; A167507, A139212, A007005, A139121, A233185.

Sequence in context: A187977 A120243 A084810 * A131422 A087720 A154111

Adjacent sequences:  A014251 A014252 A014253 * A014255 A014256 A014257

KEYWORD

nonn,word,fini

AUTHOR

Olivier Gérard

EXTENSIONS

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 (djr(AT)nk.ca), Nov 19 2006

Edited by M. F. Hasler, Nov 11 2015

STATUS

approved

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Last modified February 14 11:33 EST 2016. Contains 268318 sequences.