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 A051148 #16 Mar 01 2018 14:12:23
%S A051148 1,2,2,8,0,3,6,9,2,9,8,1,8,9,0,7,9,7,5,7,4,2,6,7,2,4,5,2,0,8,1,7,1,8,
%T A051148 9,0,4,2,3,9,3,6,6,9,5,2,6,6,0,8,5,9,6,9,4,4,6,7,0,3,8,1,4,9,1,3,7,4,
%U A051148 7,1,9,9,1,5,7,0,3,8,9,8,3,9,7,0,5,3,8,1,5,2,4,7,3,8,2,2,9,2,1
%N A051148 Decimal expansion of BesselK(1,2)/BesselK(0,2).
%H A051148 Harry J. Smith, <a href="/A051148/b051148.txt">Table of n, a(n) for n = 1..2000</a>
%H A051148 <a href="/index/Be#Bessel">Index entries for sequences related to Bessel functions or polynomials</a>
%e A051148 1.228036929818907975742672452...
%t A051148 RealDigits[ BesselK[1, 2] / BesselK[0, 2], 10, 99] // First (* _Jean-François Alcover_, Mar 07 2013 *)
%o A051148 (PARI) { allocatemem(932245000); default(realprecision, 2080); x=besselk(1,2)/besselk(0,2); for (n=1, 2000, d=floor(x); x=(x-d)*10; write("b051148.txt", n, " ", d)); } \\ _Harry J. Smith_, Apr 29 2009
%Y A051148 Cf. A051149, A000994, A000995.
%K A051148 nonn,cons,easy
%O A051148 1,2
%A A051148 _N. J. A. Sloane_, E. M. Rains
%E A051148 Fixed my PARI program, had -n. - _Harry J. Smith_, May 19 2009