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 A074999 #6 Feb 19 2018 14:42:41
%S A074999 1371742,13717421,260630990,3840876779,50754344568,630990012357,
%T A074999 7543445680146,87677901347935,990012357015724,10112346812683513,
%U A074999 11234681268351302,12357015724019091,13479350179686880
%N A074999 Floor[concatenation of nine consecutive numbers from n to n+8 divided by 9].
%H A074999 Harvey P. Dale, <a href="/A074999/b074999.txt">Table of n, a(n) for n = 0..1000</a>
%t A074999 Table[FromDigits[Flatten[IntegerDigits/@Range[n,n+8]]]/9,{n,0,20}] (* _Harvey P. Dale_, Feb 19 2018 *)
%Y A074999 Cf. A074991, A074992, A074993, A074994, A074995, A074996, A036377, A073086.
%K A074999 base,easy,nonn
%O A074999 0,1
%A A074999 _Amarnath Murthy_, Aug 31 2002
%E A074999 More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 18 2003