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 A031310 #13 Aug 27 2023 17:48:52 %S A031310 8,7,6,5,4,3,2,1,0,8,9,8,8,8,7,8,6,8,5,8,4,8,3,8,2,8,1,8,0,7,9,7,8,7, %T A031310 7,7,6,7,5,7,4,7,3,7,2,7,1,7,0,6,9,6,8,6,7,6,6,6,5,6,4,6,3,6,2,6,1,6, %U A031310 0,5,9,5,8,5,7,5,6,5,5,5,4,5,3,5,2,5,1,5,0,4 %N A031310 Write n in base 10, complement each digit and juxtapose. %C A031310 Decimal expansion of 1 minus the Champernowne constant, with offset 0. Example: 0.8765432108988878685848382818... (see A033307). - _Omar E. Pol_, Jan 31 2009 %t A031310 9 - Flatten[ IntegerDigits@ Range@ 50] (* _Robert G. Wilson v_, Jul 01 2014 *) %Y A031310 Cf. A033307. %K A031310 nonn,base %O A031310 1,1 %A A031310 _Clark Kimberling_