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 A153012 #6 Sep 02 2015 13:54:20 %S A153012 3,-3,3,-2,-1,2,2,1,-4,1,4,-4,-3,9,-4,-5,4,4,0,-8,1,5,2,0,-1,-5,2,-2, %T A153012 -2,9,-3,3,-1,-8,7,1,-3,1,3,-3,1,-6,7,-1,-2,-2,4,-1,3,-5,4,-8,7,-4,-2, %U A153012 6,-1,0,1,2,-2,-4,4,2,0,-9,7,-4,-1,2,3,1,-4,2,-4,-1,-1,7,-7,3,5,0,-3,-5,3,5 %N A153012 Differences between adjacent digits of square root of 2. %t A153012 Differences[RealDigits[Sqrt[2],10,120][[1]]] (* _Harvey P. Dale_, Sep 02 2015 *) %Y A153012 A002193 Decimal expansion of square root of 2. %K A153012 sign,base %O A153012 1,1 %A A153012 _Moritz Franckenstein_, Dec 16 2008