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 A036253 #8 May 19 2013 12:18:40
%S A036253 3,4,19,23,134,1229,2592,16781,86497,276272,1467857,12019128,
%T A036253 109640009,779499191,7125132728,22154897375,51434927478,176459679809,
%U A036253 1463112365950,6028909143609,37636567227604,81302043598817,525448828820506,2183097358880841
%N A036253 Numerator of fraction equal to the continued fraction [ 3, 1, 4, 1, 5... ] (first n digits of Pi).
%H A036253 Harvey P. Dale, <a href="/A036253/b036253.txt">Table of n, a(n) for n = 1..1000</a>
%t A036253 nn=30;With[{pidg=RealDigits[Pi,10,nn][[1]]},Numerator[Table[ FromContinuedFraction[ Take[pidg,n]],{n,nn}]]] (* _Harvey P. Dale_, Oct 08 2012 *)
%Y A036253 Cf. A036254.
%K A036253 frac,nonn,base
%O A036253 1,1
%A A036253 _Jeff Burch_
%E A036253 More terms from _Harvey P. Dale_, Oct 08 2012