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 A354681 #26 Jun 08 2022 23:20:24 %S A354681 -4,-2,0,1,2,3,4,5,6,7,8,9,10,11,12,14,15,17,19,20,22,60,100,106,110 %N A354681 Integers whose names in French contain no letter more than once. %e A354681 -4 is named as "moins quatre" (all letters different). %e A354681 13 is not in the data as "treize" repeats "e". %o A354681 (Python) %o A354681 from num2words import num2words as n2w %o A354681 def letters(n): %o A354681 return "".join(c for c in n2w(n, lang='fr') if c.isalpha()) %o A354681 def ok(n): %o A354681 w = letters(n) %o A354681 return len(w) == len(set(w)) %o A354681 print([k for k in range(-99, 1000) if ok(k)]) # _Michael S. Branicky_, Jun 08 2022 %Y A354681 Cf. A059916 (English), A117383 (Spanish). %K A354681 easy,fini,full,sign,word,less %O A354681 1,1 %A A354681 _Paul Duckett_, Jun 02 2022