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 A010538 #25 Feb 11 2025 10:02:25
%S A010538 9,3,2,7,3,7,9,0,5,3,0,8,8,8,1,5,0,4,5,5,5,4,4,7,5,5,4,2,3,2,0,5,5,6,
%T A010538 9,8,3,2,7,6,2,4,0,6,9,4,1,9,1,6,5,4,6,7,1,0,5,6,1,9,7,2,9,8,4,4,6,7,
%U A010538 8,4,5,4,8,8,0,7,2,4,9,6,7,8,4,1,4,2,2,0,5,6,2,9,1,1,8,8,2,0,1
%N A010538 Decimal expansion of square root of 87.
%C A010538 Continued fraction expansion is 9 followed by {3, 18} repeated. - _Harry J. Smith_, Jun 10 2009
%H A010538 Harry J. Smith, <a href="/A010538/b010538.txt">Table of n, a(n) for n = 1..20000</a>
%H A010538 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>.
%F A010538 Equals A002194 * A010484. - _R. J. Mathar_, Jun 08 2020
%e A010538 9.3273790530888150455544755423205569832762406...
%t A010538 RealDigits[N[87^(1/2),200]][[1]] (* _Vladimir Joseph Stephan Orlovsky_, Jan 23 2012 *)
%o A010538 (Python)
%o A010538 from math import isqrt
%o A010538 def aupton(nn): return list(map(int, str(isqrt(87 * 10**(2*nn)))))[:nn]
%o A010538 print(aupton(100)) # _Michael S. Branicky_, Sep 03 2021
%Y A010538 Cf. A040077 (continued fraction).
%Y A010538 Cf. A002194, A010484.
%K A010538 nonn,cons
%O A010538 1,1
%A A010538 _N. J. A. Sloane_