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 A141884 #14 Sep 08 2022 08:45:35 %S A141884 11,31,71,131,151,191,211,251,271,311,331,431,491,571,631,691,751,811, %T A141884 911,971,991,1031,1051,1091,1151,1171,1231,1291,1451,1471,1511,1531, %U A141884 1571,1811,1831,1871,1931,1951,2011,2111,2131,2251,2311,2351,2371,2411,2531,2551 %N A141884 Primes congruent to 11 mod 20. %H A141884 Vincenzo Librandi, <a href="/A141884/b141884.txt">Table of n, a(n) for n = 1..1000</a> %F A141884 a(n) ~ 8n log n. - _Charles R Greathouse IV_, Jul 03 2016 %t A141884 Select[Range[11,5000,20],PrimeQ[#]&] (* _Vladimir Joseph Stephan Orlovsky_, Mar 31 2011*) %t A141884 Select[Prime[Range[400]],Mod[#,20]==11&] (* _Harvey P. Dale_, Aug 10 2021 *) %o A141884 (Magma) [p: p in PrimesUpTo(3000) | p mod 20 eq 11 ]; // _Vincenzo Librandi_, Aug 16 2012 %o A141884 (PARI) is(n)=isprime(n) && n%20==11 \\ _Charles R Greathouse IV_, Jul 03 2016 %Y A141884 Cf. A000040, A105854, A141881, A141882, A141883. %K A141884 nonn,easy %O A141884 1,1 %A A141884 _N. J. A. Sloane_, Jul 11 2008