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 A032707 #14 Aug 13 2024 11:49:38
%S A032707 0,5,6,12,15,21,32,33,35,41,45,48,54,56,59,62,68,69,74,84,90,95,101,
%T A032707 108,116,117,119,126,134,141,147,155,167,171,174,176,182,186,188,194,
%U A032707 197,203,209,210,216,221,222,225,227,234,242,243,246,248,255,266
%N A032707 Numbers k such that k prefixed by '7' and followed by '1' is prime.
%H A032707 Harvey P. Dale, <a href="/A032707/b032707.txt">Table of n, a(n) for n = 1..1000</a>
%t A032707 n71Q[n_]:=PrimeQ[FromDigits[Join[{7},IntegerDigits[n],{1}]]]; Select[ Range[ 0,300],n71Q] (* _Harvey P. Dale_, Jun 20 2017 *)
%Y A032707 Cf. A032702-A032733.
%K A032707 nonn,base
%O A032707 1,2
%A A032707 _Patrick De Geest_, May 15 1998
%E A032707 Offset changed by _Andrew Howroyd_, Aug 11 2024