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 A072754 #4 Mar 30 2012 17:36:39 %S A072754 0,1,4,33,532,9609,48577,58186,106763,164949,271712,2066933,2338645, %T A072754 4405578,28772113,61949804,586320349,34068530046,34654850395, %U A072754 138033081231,586787175319,1311607431869,3210002039057,4521609470926 %N A072754 Numerators of continued fraction convergents to Copeland-Erdos constant. %o A072754 (PARI) for(n=1,30, v=vector(n,i, A030168[i]); print1(contfracpnqn(v)[1,1],",")) %Y A072754 Cf. A072755 (denominators), A030168 (continued fraction), A033308 (decimal expansion). %K A072754 frac,nonn %O A072754 0,3 %A A072754 _Rick L. Shepherd_, Jul 09 2002