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 A032732 #16 Aug 13 2024 11:13:20
%S A032732 0,1,3,6,10,12,15,21,22,30,34,36,45,48,49,52,54,55,58,63,64,66,69,75,
%T A032732 78,82,87,91,94,103,105,106,108,111,112,120,124,132,133,135,138,139,
%U A032732 141,142,147,154,156,169,171,178,180,184,187,189,190,199,201,208,210
%N A032732 Numbers k such that k prefixed by '7' and followed by '9' is prime.
%H A032732 Harvey P. Dale, <a href="/A032732/b032732.txt">Table of n, a(n) for n = 1..1000</a>
%t A032732 Select[Range[0,300],PrimeQ[FromDigits[Join[{7},IntegerDigits[#],{9}]]]&] (* _Harvey P. Dale_, Dec 03 2021 *)
%Y A032732 Cf. A032702-A032733.
%K A032732 nonn,base
%O A032732 1,3
%A A032732 _Patrick De Geest_, May 15 1998
%E A032732 Offset changed by _Andrew Howroyd_, Aug 13 2024