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 A351799 Numbers which, when written in French, contain exactly one instance of the letter E. 0
 0, 2, 4, 7, 9, 11, 12, 14, 15, 17, 19, 21, 22, 24, 27, 29, 40, 43, 45, 46, 48, 50, 53, 55, 56, 58, 60, 63, 65, 66, 68, 70, 78, 80, 81, 83, 85, 86, 88, 90, 98, 100, 101, 103, 105, 106, 108, 110, 118, 120, 123, 125, 126, 128, 300, 301, 303, 305, 306, 308, 310 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS ZERO(0) has one E (and is thus in the sequence), UN(1) has no E, DEUX(2) has one, TROIS(3) has none, QUATRE(4) has one E (and is thus in the sequence). etc. LINKS Table of n, a(n) for n=1..61. PROG (Python) from num2words import num2words from unidecode import unidecode def ok(n): return unidecode(num2words(n, lang='fr')).count("e") == 1 print([k for k in range(311) if ok(k)]) # Michael S. Branicky, Feb 19 2022 CROSSREFS Cf. A006933 ('Eban' numbers), A349887 (exactly one instance in English), A349888 (exactly two instances in English), Sequence in context: A308496 A226812 A185978 * A120749 A187978 A190193 Adjacent sequences: A351796 A351797 A351798 * A351800 A351801 A351802 KEYWORD nonn,word,less AUTHOR Carole Dubois and Eric Angelini, Feb 19 2022 STATUS approved

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Last modified September 27 04:42 EDT 2023. Contains 365673 sequences. (Running on oeis4.)