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 A176521 #10 May 02 2021 14:33:07 %S A176521 9,1,2,3,3,1,0,5,0,2,2,2,6,7,3,2,3,3,7,6,8,7,6,4,4,2,8,6,0,9,0,6,8,3, %T A176521 1,6,8,9,2,6,7,1,8,0,1,7,5,8,3,4,3,0,9,0,8,6,5,5,9,2,9,0,5,4,3,4,3,7, %U A176521 9,9,7,3,7,6,9,7,7,4,8,1,5,9,7,2,5,0,4,7,3,4,9,3,9,9,1,7,4,9,5,8,8,6,1,4,1 %N A176521 Decimal expansion of (18+3*sqrt(38))/4. %C A176521 Continued fraction expansion of (18+3*sqrt(38))/4 is A010732 preceded by 9. %H A176521 Daniel Starodubtsev, <a href="/A176521/b176521.txt">Table of n, a(n) for n = 1..10000</a> %e A176521 (18+3*sqrt(38))/4 = 9.12331050222673233768... %t A176521 RealDigits[(3*Sqrt[38] + 18)/4, 10, 100][[1]] (* _Amiram Eldar_, May 01 2021 *) %o A176521 (PARI) (3*sqrt(38)+18)/4 \\ _Charles R Greathouse IV_, Apr 25 2016 %Y A176521 Cf. A010492 (decimal expansion of sqrt(38)), A010732 (repeat 8, 9). %K A176521 cons,nonn %O A176521 1,1 %A A176521 _Klaus Brockhaus_, Apr 23 2010