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 A372204 #19 Apr 29 2024 09:29:22 %S A372204 5,7,5,6,6,5,7,6,4,6,10,10,11,15,12,10,15,12,14,9,11,12,13,16,15,13, %T A372204 14,12,13,10,12,13,14,17,16,14,15,13,14,12,14,15,16,19,18,16,17,15,16, %U A372204 13,15,16,17,20,19,17,18,16,17,12,14,15,16,19,18,16,17,15,16,12 %N A372204 a(n) is the number of letters in the Italian name of the n-th ordinal number. %H A372204 Wikipedia, <a href="https://it.wikipedia.org/wiki/Numero_ordinale">Numero ordinale</a> (in Italian). %e A372204 Primo, secondo, terzo, quarto, quinto, sesto, settimo, ottavo, nono, ... %o A372204 (Python) %o A372204 from num2words import num2words %o A372204 def A372204(n): return len(num2words(n,ordinal=True,lang='it')) # _Chai Wah Wu_, Apr 28 2024 %Y A372204 Cf. A006944, A026858. %K A372204 nonn,word %O A372204 1,1 %A A372204 _Stefano Spezia_, Apr 27 2024 %E A372204 a(17), a(19) corrected by _Chai Wah Wu_, Apr 28 2024