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 A075009 #4 Feb 14 2016 08:38:50
%S A075009 9567901,10956790,12345679,13734567,138873456,1513887345,16401388734,
%T A075009 176640138873,1892664013887,20189266401388,214518926640138,
%U A075009 227145189266401,239771451892664,252397714518926,265023977145189
%N A075009 Floor[ concatenation of 8 numbers from n+7 to n in that order divided by 8].
%H A075009 Harvey P. Dale, <a href="/A075009/b075009.txt">Table of n, a(n) for n = 0..1000</a>
%t A075009 Table[Floor[FromDigits[Flatten[IntegerDigits/@Range[n,n-7,-1]]]/8], {n,7,30}] (* _Harvey P. Dale_, Feb 14 2016 *)
%Y A075009 Cf. A074991 to A075000, A075003 to A075008, A075010.
%K A075009 base,nonn
%O A075009 0,1
%A A075009 _Amarnath Murthy_, Sep 01 2002
%E A075009 More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 18 2003