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 A032706 #17 Aug 13 2024 11:49:16
%S A032706 0,3,4,6,9,10,12,13,15,21,22,27,30,31,36,42,45,48,49,52,55,57,58,66,
%T A032706 69,70,76,78,79,84,87,91,96,97,99,100,103,105,109,112,114,115,121,123,
%U A032706 126,129,133,138,144,147,151,156,163,165,168,175,178,186,187,196
%N A032706 Numbers k such that k prefixed by '6' and followed by '1' is prime.
%H A032706 Harvey P. Dale, <a href="/A032706/b032706.txt">Table of n, a(n) for n = 1..1000</a>
%t A032706 Select[Range[0,200],PrimeQ[FromDigits[Join[{6},IntegerDigits[#],{1}]]]&] (* _Harvey P. Dale_, Jun 20 2020 *)
%Y A032706 Cf. A032702-A032733.
%K A032706 nonn,base
%O A032706 1,2
%A A032706 _Patrick De Geest_, May 15 1998
%E A032706 Offset changed by _Andrew Howroyd_, Aug 11 2024