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 A105961 #12 Sep 08 2022 08:45:17 %S A105961 2,5,11,13,19,23,37,41,43,53,61,71,79,83,89,103,107,127,151,167,173, %T A105961 179,181,191,193,197,223,229,233,239,251,281,307,313,317,349,379,421, %U A105961 431,433,439,443,467,487,523,569,571,587,593,607,613,617,641,653,659 %N A105961 Primes p such that 20*p + 3 is prime. %H A105961 Michael De Vlieger, <a href="/A105961/b105961.txt">Table of n, a(n) for n = 1..10000</a> %t A105961 Select[Prime[Range[120]], PrimeQ[20#+3]&] %o A105961 (Magma) [p: p in PrimesUpTo(5000)|IsPrime(20*p+3)] // _Vincenzo Librandi_, Jan 30 2011 %Y A105961 Cf. A023238. %K A105961 nonn %O A105961 1,1 %A A105961 _Zak Seidov_, May 05 2005