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 A104832 #10 Sep 26 2020 16:16:52
%S A104832 141592653589,415926535897,28841971693,884197169399,494459230781,
%T A104832 282306647093,359408128481,174502841027,810975665933,128475648233,
%U A104832 326648213393,146951941511,727036575959,575959195309,953092186117
%N A104832 Primes from merging of 12 successive digits in decimal expansion of Pi.
%C A104832 Some terms are less than 12 digits long because leading zeroes are permitted. - _Harvey P. Dale_, Sep 26 2020
%H A104832 Vincenzo Librandi, <a href="/A104832/b104832.txt">Table of n, a(n) for n = 1..1000</a>
%t A104832 With[{pi = FromDigits/@Partition[RealDigits[Pi, 10, 600][[1]], 12, 1]}, Select[pi, PrimeQ]] (* _Vincenzo Librandi_, Apr 21 2013 *)
%Y A104832 Cf. A104819 - A104842.
%K A104832 nonn,base
%O A104832 1,1
%A A104832 _Zak Seidov_, Mar 27 2005