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 A164793 #10 Feb 02 2021 22:46:41
%S A164793 -1,5,13,-1,1000000,4000000,45,25,75,13000000,17000000,105,113,305,
%T A164793 313,3013,145,125,175,325,375,3075,1105,1113,1305,1313,3305,1145,1125,
%U A164793 1175,1325,1375,3325,3375,11375,13325,13375,17375,23325,23375,73375,101375,103325
%N A164793 a(n) is the smallest number whose English name has the letter "i" in the n-th position, or -1 if no such number exists.
%C A164793 Original definition used "-2 for infinite".
%e A164793 a(2)=5 ("fIve"), a(3)=13 ("thIrteen"), a(5)=10^6 ("onemIllion").
%Y A164793 Cf. A164789 ("o"), A164790 ("e"), A164791 ("n"), A164792 ("t").
%Y A164793 Cf. A164794 ("f"), A164795 ("h"), A164796 ("r"), A164797 ("u").
%K A164793 word,sign
%O A164793 1,2
%A A164793 _Claudio Meller_, Aug 26 2009
%E A164793 a(11) and beyond from _Michael S. Branicky_, Feb 02 2021
%E A164793 Name changed to remove "-2" (see Comments), and a(1) and a(4) changed from -2 to -1 by _Jon E. Schoenfield_, Feb 02 2021