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 A090671 #1 Feb 19 2004 03:00:00
%S A090671 9,8,7,6,5,4,3,2,1,99,98,97,96,95,94,93,92,91,90,89,88,87,86,85,84,83,
%T A090671 82,81,80,79,78,77,76,75,74,73,72,71,70,69,68,67,66,65,64,63,62,61,60,
%U A090671 59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37
%N A090671 Decreases from 10^k - 1 down to 1, restarting at 10^(k+1) - 1, for k >= 1.
%C A090671 Points of local maximum: ( 10^k - 1 ) k = {1,2,3,4,5,.....}
%Y A090671 Cf. A089186, A035327.
%K A090671 easy,nonn
%O A090671 1,1
%A A090671 Artemario Tadeu Medeiros da Silva (artemario(AT)uol.com.br), Dec 17 2003