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 A051149 #13 Sep 07 2018 17:01:44
%S A051149 1,4,2,1,1,2,8,1,6,1,4,2,1,8,1,1,7,1,6,4,2,1,6,1,1,2,1,1,1,2,5,1,3,3,
%T A051149 1,3,1,8,1,1,1,1,1,2,3,8,3,29,1,7,1,57,1,121,2,14,2,8,1,1,16,1,3,1,5,
%U A051149 1,5,1,4,17,1,5,6,1,3,2,9,7,1,4,4,1,1,16,3,5,2,1,2,1
%N A051149 Continued fraction for BesselK(1,2)/BesselK(0,2).
%H A051149 Harry J. Smith, <a href="/A051149/b051149.txt">Table of n, a(n) for n = 0..2000</a>
%H A051149 G. Xiao, <a href="http://wims.unice.fr/~wims/en_tool~number~contfrac.en.html">Contfrac</a>
%H A051149 <a href="/index/Be#Bessel">Index entries for sequences related to Bessel functions or polynomials</a>
%H A051149 <a href="/index/Con#confC">Index entries for continued fractions for constants</a>
%e A051149 1.228036929818907975742672452...
%e A051149 BesselK(1,2)/BesselK(0,2) = 1 + 1/(4 + 1/(2 + 1/(1 + 1/(1 + ...)))). - _Harry J. Smith_, Apr 29 2009
%t A051149 ContinuedFraction[BesselK[1,2]/BesselK[0,2],90] (* _Harvey P. Dale_, Sep 07 2018 *)
%o A051149 (PARI) { allocatemem(932245000); default(realprecision, 2100); x=contfrac(besselk(1,2)/besselk(0,2)); for (n=1, 2001, write("b051149.txt", n-1, " ", x[n])); } \\ _Harry J. Smith_, Apr 29 2009
%Y A051149 Cf. A051148, A000994, A000995.
%K A051149 nonn,cofr
%O A051149 0,2
%A A051149 _N. J. A. Sloane_, E. M. Rains