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 A198777 #14 Dec 14 2014 06:18:23
%S A198777 577,431,421,593,359,593,359,677,677,467,709,947,467,463,631,809,401,
%T A198777 283,241,173,739,997,449,353,3,337,293,937,373,733,337,773,673,739,
%U A198777 709,491,853,233,331,151,661,211,199,79,479,937,857,2,29,547,29,43,421
%N A198777 Primes from merging of 3 successive digits in decimal expansion of Euler-Mascheroni constant.
%C A198777 Leading zeros are permitted, so some terms are less than 3 digits in length.
%H A198777 Vincenzo Librandi, <a href="/A198777/b198777.txt">Table of n, a(n) for n = 1..1000</a>
%t A198777 egp[len_]:=Module[{egterms=FromDigits/@Partition[RealDigits[EulerGamma, 10, 1000][[1]],len,1]},Select[egterms,PrimeQ[#]&]]; egp[3]
%Y A198777 Cf. A103773, A103789, A103793,A103808,A103809,A103810, A103811, A103812, A104824, A104825, A104826, A104843, A104844, A104845, A104846, A104847, A104848, A104849, A104850, A104937, A198161, A198162, A198163, A198164, A198165, A198166, A198167, A198168, A198169, A198170, A198171, A198172, A198173, A198175, A104851, A198177, A198776, A198778, A198779, A198780, A198781, A198782, A198783, A198784.
%K A198777 nonn,base
%O A198777 1,1
%A A198777 _Harvey P. Dale_, Oct 29 2011