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 A120455 #8 Dec 15 2017 17:37:04
%S A120455 0,7,2,1,7,4,1,60,19,1,1,3,2,2,1,1,11098619,1,2,2,1,1,1,1,3,1,5,1,1,4,
%T A120455 4,4,11,14,1,23,3,4,1,3,1,5,1,2,5,11,5,1,
%U A120455 431504180604995178786476739454249921717325183597033134416,1,2,2,1,16,2
%N A120455 Continued fraction expansion of the decimal number formed from concatenated triangular numbers (0.1361015212836455566789110...).
%C A120455 The 140th term has 251 digits.
%H A120455 J. Earls & J. Rogers, <a href="http://tinyurl.com/o7qlb">0.1361015212836455566...(Title of split novel)</a>
%t A120455 ContinuedFraction[With[{trnocat=FromDigits[Flatten[IntegerDigits/@ Accumulate[ Range[600]]]]},N[trnocat/10^IntegerLength[trnocat], 1000]],60] (* _Harvey P. Dale_, Mar 25 2012 *)
%Y A120455 Cf. A030167.
%K A120455 cofr,easy,nonn,base
%O A120455 0,2
%A A120455 _Jason Earls_, Jul 07 2006