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 A102700 #28 Feb 03 2024 00:50:01 %S A102700 1,2,5,7,8,10,13,14,17,19,22,23,26,34,35,37,38,40,41,43,44,47,49,50, %T A102700 56,59,61,65,70,71,73,76,80,82,83,85,91,92,100,101,103,104,106,110, %U A102700 112,122,124,125,127,128,131,139,140,142,143,145,148,149,154,155,157,160,161 %N A102700 Numbers k such that 10*k + 9 is prime. %H A102700 Daniel Starodubtsev, <a href="/A102700/b102700.txt">Table of n, a(n) for n = 1..10000</a> %H A102700 Chris Caldwell, <a href="http://www.utm.edu/research/primes/lists/small/1000.txt">The first 1,000 primes</a>. %e A102700 10*1 + 9 = 19 (prime); %e A102700 10*40 + 9 = 409 (prime); %e A102700 10*70 + 9 = 709 (prime). %t A102700 Select[Range[0, 170], PrimeQ[10# + 9] &] (* _Ray Chandler_, Nov 07 2006 *) %o A102700 (Magma) [n: n in [0..3000]| IsPrime(10*n+9)]; // _Vincenzo Librandi_, Apr 06 2011 %o A102700 (PARI) is(n)=isprime(10*n+9) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A102700 Cf. A030433, A049510. %K A102700 base,nonn %O A102700 1,2 %A A102700 _Parthasarathy Nambi_, Feb 04 2005 %E A102700 Edited and extended by _Ray Chandler_, Nov 07 2006