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 A362442 #14 Apr 23 2023 07:28:03 %S A362442 6,11,23,323,1103323373373373373373373373373 %N A362442 a(1) = 6; thereafter a(n) = smallest number with a(n-1) letters in American English. %C A362442 a(5) should be findable, but a(6) will probably not be well defined. %C A362442 See A362441 for a British English version. %D A362442 GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See pages 92 and 275. %F A362442 a(n) = A080777(a(n-1)) for n > 1. - _Michael S. Branicky_, Apr 22 2023 %e A362442 a(2) = 11 since "eleven" is the smallest number with 6 letters. %e A362442 a(3) = 23 since "twenty three" is the smallest with 11 letters. %Y A362442 Cf. A005589, A362123, A362441. %K A362442 nonn,word,more %O A362442 1,1 %A A362442 _N. J. A. Sloane_, Apr 22 2023 %E A362442 a(5) from _Michael S. Branicky_, Apr 22 2023 using A080777