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 A161321 #8 Feb 16 2020 11:20:18 %S A161321 0,9,1,6,0,7,9,7,8,3,0,9,9,6,1,6,0,4,2,5,6,7,3,2,8,2,9,1,5,6,1,6,1,7, %T A161321 0,4,8,4,1,5,5,0,1,2,3,0,7,9,4,3,4,0,3,2,2,8,7,9,7,1,9,6,6,9,1,4,2,8, %U A161321 2,2,4,5,9,1,0,5,6,5,3,0,3,6,7,6,5,7,5,2,5,2,7,1,8,3,1,0,9,1,7,8 %N A161321 Decimal expansion of (sqrt(35)-5)/10. %D A161321 D. Mumford et al., Indra's Pearls, Cambridge 2002; see p. 321. %H A161321 Daniel Starodubtsev, <a href="/A161321/b161321.txt">Table of n, a(n) for n = 0..10000</a> %e A161321 .091607978309961604256732829156161704841550123079434032287971... %o A161321 (PARI) (sqrt(35)-5)/10 \\ _Michel Marcus_, Feb 16 2020 %Y A161321 Cf. A090656, A010490. %K A161321 nonn,cons %O A161321 0,2 %A A161321 _N. J. A. Sloane_, Nov 22 2009