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 A082655 #6 Apr 07 2020 03:39:58 %S A082655 3,5,7,9,11,13,13,14,14,14,15,15,15,15,15,15,15,15,15,16,16,16,16,16, %T A082655 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16, %U A082655 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16 %N A082655 Number of distinct letters needed to spell English names of numbers 1 through n. %C A082655 Late increases are at twentY, hunDred, thousAnd, Million, Billion, Quadrillion, sePtillion, oCtillion. %C A082655 Only J and K are never used for English number names. Z is used only for zero. %e A082655 "One" has three letters, "two" brings two new letters (t w), "three" brings two more (h r)... %Y A082655 Cf. A005589, A052360, A052362, A052363. %K A082655 nonn,word,easy %O A082655 1,1 %A A082655 Peter F. Klammer (pklammer(AT)acm.org), May 17 2003 %E A082655 Edited by _Don Reble_, Nov 03 2003 %E A082655 More terms from _Jinyuan Wang_, Apr 07 2020