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 A022857 #4 Mar 30 2012 18:55:51 %S A022857 1,1,2,3,5,9,16,29,52,93,167,300,539,968,1739,3124,5613,10085,18120, %T A022857 32556,58494,105098,188832,339280,609594,1095275,1967912,3535805, %U A022857 6352883,11414410,20508602,36848402,66206596,118955318,213730481 %N A022857 a(n) = [ a(n-1)/a(1) + a(n-2)/a(2) + ... + a(1)/a(n-1) ], for n >= 3. %K A022857 nonn %O A022857 1,3 %A A022857 _Clark Kimberling_