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 A175937 #7 Mar 30 2012 19:01:01
%S A175937 1,2,10,62,448,3464,28111,236022,2033145,17867442,159558635,
%T A175937 1443747386,13207922431,121962046864,1135246916024,10640772522150,
%U A175937 100346005711723,951400275042466,9063703952844960,86718277215053218,832901296331740527
%N A175937 Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k),(r,r)|0<k<=4,0<r<=2} which never go above the line y=x.
%Y A175937 Cf. A175934, A175935, A175936, A175939
%K A175937 nonn
%O A175937 0,2
%A A175937 _Eric Werley_, Dec 06 2010