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 A372807 #27 Jun 21 2024 15:30:55 %S A372807 11,17,21,22,23,24,25,26,28,29,31,32,33,34,35,36,38,39,41,42,43,44,45, %T A372807 46,48,49,51,52,53,54,55,56,58,59,61,62,63,64,65,66,68,69,70,81,82,83, %U A372807 84,85,86,88,89,91,92,93,94,95,96,98,99,100,200,300,400,500,600,800,900 %N A372807 Numbers whose American English name has exactly three syllables. %C A372807 There are 107 terms, considering all terms up to 10^66 using English names of large numbers and various conventional extensions thereof (see Wikipedia link), since quadrillion, quintillion, etc. each have three or more syllables themselves. Terms like "one googol" (or possibly "a googol"), "two googol," ..., "twelve googol" are unconventional, hence disallowed. - _Michael S. Branicky_, May 28 2024 %H A372807 Michael S. Branicky, <a href="/A372807/b372807.txt">Table of n, a(n) for n = 1..107</a> %H A372807 Wikipedia, <a href="https://en.wikipedia.org/wiki/Names_of_large_numbers">Names of Large Numbers</a> %F A372807 A075774(a(n)) = 3. - _Michael S. Branicky_, May 27 2024 %e A372807 a(2) = 17 is the second number whose name in American English has exactly three syllables: "seventeen". %o A372807 (Python) # uses function in A075774 %o A372807 print([k for k in range(501) if A075774(k) == 3]) # _Michael S. Branicky_, May 27 2024 %Y A372807 Cf. A075774, A180961. %K A372807 nonn,easy,fini,full,word,less %O A372807 1,1 %A A372807 _Marc Groz_, May 13 2024