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 A127177 #11 Jul 21 2017 16:36:52
%S A127177 3,7,71,103,113,163,173,311,313,331,337,349,373,757,773,797,919,953,
%T A127177 977,991,1109,1123,1151,1171,1181,1213,1237,1277,1279,1297,1327,1423,
%U A127177 1447,1543,1553,1567,1621,1663,1669,1747,1811,1873,1877,1889,1993,1999,3049
%N A127177 Primes whose "Look And Say" descriptions from right to left (in the sense of method A, i.e., frequency followed by digit-indication) are also primes.
%e A127177 71, 331 and 1277, for instance, belong to the sequence because their respective descriptions 1171 (one 1, one 7), 1123 (one 1, two 3's) and 271211 (two 7's, one 2, one 1) are primes.
%t A127177 LookAndSayA[ n_] := FromDigits@Flatten@((Through[ {Length, First}[ # ] ] &) /@ Split@Reverse@IntegerDigits@n); Select[Prime@Range[450],PrimeQ@LookAndSayA@# &] (* _Ray Chandler_, Jan 16 2007 *)
%Y A127177 Cf. A006711, A127178, A127179.
%K A127177 nonn,base
%O A127177 1,1
%A A127177 _Lekraj Beedassy_, Jan 07 2007
%E A127177 Extended by _Ray Chandler_, Jan 16 2007