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 A142797 #11 Sep 08 2022 08:45:37
%S A142797 109,229,349,409,709,769,829,1009,1069,1129,1249,1429,1489,1549,1609,
%T A142797 1669,1789,2029,2089,2269,2389,2689,2749,3049,3109,3169,3229,3469,
%U A142797 3529,3709,3769,3889,4129,4549,4729,4789,4909,4969,5209,5449,5569,5689,5749,5869
%N A142797 Primes congruent to 49 mod 60.
%H A142797 Vincenzo Librandi, <a href="/A142797/b142797.txt">Table of n, a(n) for n = 1..1000</a>
%F A142797 a(n) ~ 16n log n. - _Charles R Greathouse IV_, Jul 03 2016
%t A142797 Select[Prime[Range[900]], MemberQ[{49}, Mod[#, 60]] &] (* _Vincenzo Librandi_, Sep 04 2012 *)
%t A142797 Select[Range[49,6000,60],PrimeQ] (* _Harvey P. Dale_, Oct 02 2018 *)
%o A142797 (Magma) [p: p in PrimesUpTo(6000) | p mod 60 eq 49 ]; // _Vincenzo Librandi_, Sep 04 2012
%o A142797 (PARI) is(n)=isprime(n) && n%60==49 \\ _Charles R Greathouse IV_, Jul 03 2016
%Y A142797 Cf. A000040.
%K A142797 nonn,easy
%O A142797 1,1
%A A142797 _N. J. A. Sloane_, Jul 11 2008