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 A083375 #2 Mar 31 2012 13:21:56 %S A083375 1,1,2,2,2,3,3,3,3,3,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6, %T A083375 6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8, %U A083375 8,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9 %N A083375 n appears prime(n) times. %e A083375 a(10)=3 because the sequence opens with 2 1's, 3 2's and 5 3's. %K A083375 nonn %O A083375 1,3 %A A083375 _Jon Perry_, Jun 05 2003