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 A032715 #17 Aug 13 2024 11:14:24
%S A032715 3,4,7,10,19,21,24,25,28,33,39,43,52,57,58,60,64,67,70,72,75,79,82,85,
%T A032715 87,88,93,96,99,102,114,115,123,126,129,133,135,136,141,144,145,147,
%U A032715 148,150,156,159,163,166,169,171,184,193,196,198,199,204,205,207
%N A032715 Numbers k such that k prefixed by '7' and followed by '3' is prime.
%H A032715 Harvey P. Dale, <a href="/A032715/b032715.txt">Table of n, a(n) for n = 1..1000</a>
%t A032715 Select[Range[300],PrimeQ[FromDigits[Join[{7},IntegerDigits[#],{3}]]]&] (* _Harvey P. Dale_, Mar 31 2024 *)
%Y A032715 Cf. A032702-A032733.
%K A032715 nonn,base
%O A032715 1,1
%A A032715 _Patrick De Geest_, May 15 1998
%E A032715 Offset changed by _Andrew Howroyd_, Aug 13 2024