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 A032708 #16 Aug 13 2024 11:50:11
%S A032708 1,2,8,10,11,16,17,19,22,23,29,31,43,46,50,52,58,64,68,73,74,76,82,83,
%T A032708 86,94,95,97,100,103,104,107,110,113,118,128,133,137,140,142,155,161,
%U A032708 167,170,176,190,193,197,202,203,205,214,217,223,224,226,230,235
%N A032708 Numbers k such that k prefixed by '8' and followed by '1' is prime.
%t A032708 Select[Range[250],PrimeQ[FromDigits[Join[{8}, IntegerDigits[#],{1}]]]&] (* _Harvey P. Dale_, Mar 24 2011 *)
%Y A032708 Cf. A032702-A032733.
%K A032708 nonn,base
%O A032708 1,2
%A A032708 _Patrick De Geest_, May 15 1998
%E A032708 Offset changed by _Andrew Howroyd_, Aug 11 2024