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 A089206 #1 Feb 19 2004 03:00:00 %S A089206 2,3,9,4,8,32,5,25,125,625,6,9,18,54,324,7,49,343,2401,16807,117649,8, %T A089206 32,256,512,4096,16384,131072,9,81,243,2187,19683,59049,531441, %U A089206 4782969,10,25,125,625,1250,3125,31250,156250,1562500 %N A089206 Denominators of array in A089204. %Y A089206 Cf. A089201, A088141. %K A089206 frac,nonn,tabl %O A089206 1,1 %A A089206 Artemario Tadeu Medeiros da Silva (artemario(AT)uol.com.br), Dec 09 2003