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 A134729 #8 Oct 21 2017 16:21:38
%S A134729 2,35,112329,41538389,113131173179191,233239251281293359,
%T A134729 419431443491509593641,653659683719743761809911,
%U A134729 95310131019103110491103122312291289,1409143914511481149915111559158316011733,18111889190119311973200320392063206921292141
%N A134729 Concatenation of next n Sophie Germain primes A005384(n).
%t A134729 With[{sgp=Select[Prime[Range[500]],PrimeQ[2#+1]&]},Table[ FromDigits[ Flatten[IntegerDigits/@Take[sgp,{(n(n+1))/2+1,((n+1)(n+2))/2}]]],{n,0,11}]] (* _Harvey P. Dale_, Mar 24 2013 *)
%Y A134729 Cf. A005384, A053067, A133013, A133014.
%K A134729 base,easy,nonn
%O A134729 1,1
%A A134729 _Omar E. Pol_, Nov 10 2007
%E A134729 More terms from _Harvey P. Dale_, Mar 24 2013