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 A112507 #3 Mar 30 2012 17:36:43 %S A112507 3,5,5,8,10,14,14,15,16,16,21,23,23,27,29,33,36,39,44,46,53,55,56,58, %T A112507 62,63,64,66,67,67,67,72,75,77,82,83,87,88,92,93,95,95,99,100,102,105, %U A112507 114,120,159,254 %N A112507 Number of counties per state of the USA in increasing order. %C A112507 Alabama, Florida and Pennsylvania each have 67 counties. Five pairs of states share other numbers of counties. See also related comments in A112506. %D A112507 "Populations and Areas of Counties and States", The World Almanac and Book of Facts (2000 edition). New Jersey: Primedia Reference Inc., 1999. pp. 427-445. %e A112507 Delaware is the state of the United States of America with the fewest number of counties so a(1)=3 because that state has 3 counties. Texas, the state with the most counties, has a(50)=254 counties. %Y A112507 Cf. A112506 (same but in alphabetical order by state). %K A112507 fini,full,nonn %O A112507 1,1 %A A112507 _Rick L. Shepherd_, Sep 08 2005