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 A104823 #15 Dec 14 2014 02:05:29
%S A104823 653,643,433,383,419,197,971,937,751,97,307,89,421,211,67,821,823,647,
%T A104823 709,223,317,359,811,701,19,193,521,211,229,881,109,97,659,593,461,
%U A104823 823,233,337,271,19,821,607,491,127
%N A104823 Primes from merging of three successive digits in decimal expansion of Pi.
%C A104823 Leading zeros are permitted, so not every term is 3 digits in length. - _Harvey P. Dale_, Oct 24 2011
%H A104823 Vincenzo Librandi, <a href="/A104823/b104823.txt">Table of n, a(n) for n = 1..1000</a>
%t A104823 With[{pi = FromDigits/@Partition[RealDigits[Pi, 10, 500][[1]], 3, 1]}, Select[pi, PrimeQ]] (* _Vincenzo Librandi_, Apr 23 2013 *)
%Y A104823 Cf. A104819-A104842.
%K A104823 nonn,base
%O A104823 1,1
%A A104823 _Zak Seidov_, Mar 27 2005