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 A191245 #13 Apr 16 2023 10:42:17
%S A191245 3,7,11,19,53,97,103,127,131,149,179,197,227,239,277,283,337,349,409,
%T A191245 457,463,487,499,569,599,641,659,683,701,719,743,809,839,953,971,1013,
%U A191245 1019,1051,1093,1201,1213,1237,1291,1297,1303,1321,1381,1423,1543,1597,1621,1747,1753,1783,1801
%N A191245 Primes that remain prime if the bit pattern 10 is attached as the most-significant bits to their binary representation.
%C A191245 Obtained by chopping the two most-significant bits off the associated A191235(n). - _R. J. Mathar_, Jun 03 2011
%e A191245 19 is in the sequence, because 19=10011_2 prefixed with 10_2 is 1010011_2 = 19+62=83 which still is prime.
%t A191245 Select[Prime[Range[300]],PrimeQ[FromDigits[Join[{1,0},IntegerDigits[ #,2]],2]]&] (* _Harvey P. Dale_, Apr 11 2012 *)
%Y A191245 Cf. A004676, A191235.
%K A191245 nonn,base,less
%O A191245 1,1
%A A191245 _Juri-Stepan Gerasimov_, May 28 2011
%E A191245 Corrected by _R. J. Mathar_, Jun 03 2011