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 A176457 #4 Apr 07 2018 06:55:19 %S A176457 8,1,4,0,3,9,3,3,5,6,0,5,4,1,2,5,3,0,6,7,7,6,7,6,1,1,8,7,7,6,2,7,9,1, %T A176457 9,2,0,8,9,7,1,8,0,8,2,1,3,5,9,7,0,6,5,9,6,7,7,0,2,6,4,2,3,0,6,0,5,1, %U A176457 8,4,1,0,6,4,7,2,4,8,0,1,2,0,4,8,9,3,0,3,7,6,9,1,4,3,8,9,0,7,1,3,6,4,3,7,2 %N A176457 Decimal expansion of (28+2*sqrt(210))/7. %C A176457 Continued fraction expansion of (28+2*sqrt(210))/7 is A010728 preceded by 8. %C A176457 a(n) = A171539(n-1) for n > 1. %e A176457 (28+2*sqrt(210))/7 = 8.14039335605412530677... %t A176457 RealDigits[(28+2Sqrt[210])/7,10,120][[1]] (* _Harvey P. Dale_, Apr 07 2018 *) %Y A176457 Cf. A171539 (decimal expansion of sqrt(6/35)), A176441 (decimal expansion of sqrt(210)), A010728 (repeat 7, 8). %K A176457 cons,nonn %O A176457 1,1 %A A176457 _Klaus Brockhaus_, Apr 20 2010