This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A007005 M0942 #50 Jul 10 2024 20:06:21
%S A007005 4,2,4,5,6,4,3,4,4,4,3,4,5,6,8,6,5,8,8,8,5,11,10,11,12,10,9,10,10,10,
%T A007005 6,12,11,12,13,11,10,11,11,11,8,14,13,14,15,13,12,13,13,13,9,15,14,15,
%U A007005 16,14,13,14,14,14,8,14,13,14,15,13,12,13,13,13,12,16,14,15,17,15,14
%N A007005 Number of characters in the French spelling of n, including spaces and hyphens.
%C A007005 This sequence gives the number of characters, including spaces and hyphens, in the French spelling of the numbers; e.g., a(21) = 11 = #"vingt et un", a(22) = 10 = #"vingt-deux". - _M. F. Hasler_, Nov 18 2009
%C A007005 See A167507 for a variant where only letters are counted, but spaces and hyphens are not counted. - _M. F. Hasler_, Jun 03 2012
%C A007005 See A052360 for the English version (and A005589 for the letters-only variant); A007208 for the German version. - _M. F. Hasler_, Sep 20 2014
%C A007005 This refers to the official French spelling, Swiss or Belgian variants ("septante", ...) are not considered here. - _M. F. Hasler_, Sep 21 2014
%D A007005 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A007005 M. F. Hasler, <a href="/A007005/b007005.txt">Table of n, a(n) for n = 0..1000</a>
%H A007005 Wiktionnaire, <a href="http://fr.wiktionary.org/wiki/Annexe:Nombres_de_1_%C3%A0_100_en_fran%C3%A7ais">Annexe:Nombres de 1 à 100 en français</a>. [From _M. F. Hasler_, Nov 18 2009]
%H A007005 <a href="/index/Lc#letters">Index entries for sequences related to number of letters in n</a>
%e A007005 a(0) = 4 = #"zéro"
%e A007005 a(80) = 13 = #"quatre-vingts"
%e A007005 a(999) = 31 = #"neuf cent quatre-vingt-dix-neuf"
%e A007005 a(1000) = 5 = # "mille"
%o A007005 (PARI) A007005(n)=#French(n) /* cf. A167507 for PARI code of "French()" - _M. F. Hasler_, Jun 03 2012 */
%Y A007005 Cf. A005589, A007208, A052360, A167507.
%K A007005 nonn,word,easy,nice
%O A007005 0,1
%A A007005 _Simon Plouffe_
%E A007005 a(71) and a(74) corrected by _M. F. Hasler_, Jun 03 2012
%E A007005 Example completed by _Rémy Sigrist_, Sep 09 2018