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 A020770 #13 Jul 08 2025 07:49:36 %S A020770 2,7,7,3,5,0,0,9,8,1,1,2,6,1,4,5,6,1,0,0,9,1,7,0,8,6,6,7,2,8,4,9,9,6, %T A020770 8,8,1,7,3,1,7,6,6,5,9,5,2,6,5,5,7,4,0,0,9,7,7,7,2,7,1,5,8,1,7,1,3,2, %U A020770 0,5,3,4,4,8,4,0,7,7,7,2,6,5,5,4,2,0,1,4,6,7,8,4,7,5,7,6,2,0,9 %N A020770 Decimal expansion of 1/sqrt(13). %C A020770 1/sqrt(13) = 0.277350098112614561009170866728499688173176659526557400977727158171320534484... [_Vladimir Joseph Stephan Orlovsky_, May 30 2010] %H A020770 Ivan Panchenko, <a href="/A020770/b020770.txt">Table of n, a(n) for n = 0..1000</a> %t A020770 RealDigits[N[1/Sqrt[13],200]] (* _Vladimir Joseph Stephan Orlovsky_, May 30 2010 *) %Y A020770 Cf. A010470. %K A020770 nonn,cons %O A020770 0,1 %A A020770 _N. J. A. Sloane_