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 A127175 #9 Jul 21 2017 13:09:48
%S A127175 3,7,17,23,41,89,113,131,137,163,179,193,271,281,283,337,389,431,443,
%T A127175 457,479,587,593,613,661,673,683,691,727,739,757,787,809,829,863,883,
%U A127175 907,983,1009,1051,1087,1123,1153,1163,1181,1213,1229,1249,1279,1297
%N A127175 Primes whose "Look And Say" descriptions from left to right (in the sense of method B, i.e., digit-indication followed by frequency) are also primes.
%e A127175 41, 337, 809, 1123, for instance, are in the sequence because their respective descriptions 4111 (4 once, 1 once), 3271 (3 twice, 7 once), 810191 (8 once, 0 once, 9 once), 122131 (1 twice, 2 once, 3 once) are also primes.
%t A127175 LookAndSayB[ n_] := FromDigits@Flatten@((Through[ {First, Length}[ # ] ] &) /@ Split@IntegerDigits@n); Select[Prime@Range[215], PrimeQ@LookAndSayB@# &] (* _Ray Chandler_, Jan 08 2007 *)
%Y A127175 Cf. A007651, A056815, A127176.
%K A127175 base,nonn
%O A127175 1,1
%A A127175 _Lekraj Beedassy_, Jan 07 2007
%E A127175 Corrected by _Ray Chandler_, Jan 08 2007