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 A126330 #12 Oct 10 2019 13:53:39 %S A126330 11,23,31,47,71,79,127,151,167,191,239,271,359,431,439,599,607,631, %T A126330 719,727,911,919,967,1031,1087,1231,1327,1399,1439,1471,1559,1607, %U A126330 1759,1831,1847,1871,1951,1999,2039,2087,2287,2311,2351,2399,2591,2647,2711,2767 %N A126330 Primes of the form 4p+3 where p is a prime. %H A126330 Robert Israel, <a href="/A126330/b126330.txt">Table of n, a(n) for n = 1..10000</a> %p A126330 select(p -> isprime(p) and isprime((p-3)/4), [seq(p,p=7..10000,4)]); # _Robert Israel_, Aug 08 2019 %t A126330 Select[3 + 4Prime@Range[130], PrimeQ] (* _Ray Chandler_, Jun 29 2008 *) %Y A126330 For the primes p see A023213. %Y A126330 Cf. A002145, A004767, A080148, A090866, A095278. %K A126330 nonn %O A126330 1,1 %A A126330 _J. M. Bergot_, Mar 09 2007 %E A126330 Checked and extended by _N. J. A. Sloane_, Mar 10 2007