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 A073085 #15 Sep 08 2022 08:45:06 %S A073085 1,2,3,5,7,11,12,13,16,17,20,22,23,28,29,30,35,36,39,42,44,46,47,50, %T A073085 51,53,55,57,59,60,64,67,68,72,73,74,78,81,83,85,86,88,89,93,96,100, %U A073085 101,104,105,111,115,117,118,121,122,124,125,128,129,135,137,139,140,141 %N A073085 Numbers n such that 210*n+1 is prime. %H A073085 Vincenzo Librandi, <a href="/A073085/b073085.txt">Table of n, a(n) for n = 1..1000</a> %e A073085 1 is a member because 210*1+1=211 is prime; 100 is a member because 210*100+1=21001 is prime. %t A073085 Flatten[Position[PrimeQ[210Range[100]+1], True]] %t A073085 Select[Range[150], PrimeQ[(210*# + 1)] &] (* _Vincenzo Librandi_, Sep 30 2012 *) %o A073085 (Magma) [n: n in [1..200] | IsPrime(210*n + 1)]; _Vincenzo Librandi_, Sep 30 2012 %o A073085 (PARI) is(n)=isprime(210*n+1) \\ _Charles R Greathouse IV_, May 22 2017 %Y A073085 Cf. A073102. %K A073085 easy,nonn %O A073085 1,2 %A A073085 _Zak Seidov_, Oct 08 2002