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 A105857 #3 Mar 30 2012 18:50:49 %S A105857 0,1,3,4,5,6,9,12,17,21,30,42,47,51,61,74,79,102,124,136,148,195,206, %T A105857 218,252,279,300,314,323,346,416,475,503,532,574,589,596,711,731,744, %U A105857 778,785,818,850,862,873,929,950,1015,1088,1117,1141,1152,1230,1245 %N A105857 Where records occur in A104647. %C A105857 A105858(n) = A104647(a(n)). %K A105857 nonn %O A105857 0,3 %A A105857 _Reinhard Zumkeller_, Apr 23 2005