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 A168356 #6 Jun 02 2025 02:12:17 %S A168356 1,0,1,8,-3,-3,3,-3,0,5,4,-1,0,-4,-7,0,6,1,-2,-2,0,2,-3,-1,5,0,-6,4,7, %T A168356 -2,-9,-3,8,6,-4,-7,5,6,-8,-1,8,-3,0,6,-6,-2,2,-6,-5,4,8,-3,-8,7,7,-5, %U A168356 2,0,-5,1,5,-3,-6,-2,4,8,-6,-2,3,-6,2,2,2,4,-6,-6,6,9,1,-1,-3,-6,2,-2,-5 %N A168356 A000796(n-2) - A000796(n). %C A168356 Difference between digit n of pi and digit n+2. %t A168356 Last[#]-First[#]&/@Partition[RealDigits[\[Pi],10,150][[1]], 3,1] (* _Harvey P. Dale_, Mar 18 2011 *) %Y A168356 Cf. A000796 %K A168356 base,sign %O A168356 1,4 %A A168356 Mark Lessel (mark(AT)lessel.us), Nov 23 2009