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 A104844 #10 Dec 14 2014 06:19:48
%S A104844 271,281,523,353,977,757,709,967,277,353,547,457,571,821,251,919,193,
%T A104844 599,181,359,563,307,349,907,233,829,251,101,157,383,307,149,499,167,
%U A104844 509,761,853,107,907,449,499,761,613,331,313,449,673,113,709,709,127
%N A104844 Primes from merging of 3 successive digits in decimal expansion of e.
%C A104844 Leading zeros are not permitted, so each term is 3 digits in length. - _Harvey P. Dale_, Oct 23 2011
%H A104844 Vincenzo Librandi, <a href="/A104844/b104844.txt">Table of n, a(n) for n = 1..3000</a>
%t A104844 With[{len=3},FromDigits/@Select[Partition[RealDigits[E,10,1000][[1]], len,1],PrimeQ[FromDigits[#]]&&IntegerLength[FromDigits[#]]==len&]] (* _Harvey P. Dale_, Oct 23 2011 *)
%Y A104844 Cf. A104843-A104862.
%K A104844 nonn,base
%O A104844 1,1
%A A104844 Andrew G. West (WestA(AT)wlu.edu), Mar 27 2005
%E A104844 Offset changed from 0 to 1 by _Vincenzo Librandi_, Apr 21 2013