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

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

Offset: 1

Author

Olivier Gérard

Keywords

• nonn
• word
• fini

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)!

Examples

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

References

• Georges Perec, La disparition, Editions Gallimard, Paris, 1969; English translation: A Void, Harvill, 1994. (A novel that does not use the letter "e". These numbers are not mentioned, however.)

Links

• N. Graner, Liponombres [<>]

Crossrefs

Cf. A006933, A050280 (primes); A167507, A139212, A007005, A139121, A233185.

Programs

PARI

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

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, Nov 19 2006

Edited by M. F. Hasler, Nov 11 2015