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 A141963 #12 Sep 08 2022 08:45:35 %S A141963 23,131,239,293,347,401,509,563,617,887,941,1049,1103,1319,1373,1427, %T A141963 1481,1697,1913,2129,2237,2399,2777,2939,3209,3371,3533,3803,3911, %U A141963 4019,4073,4127,4289,4397,4451,4721,4937,5099,5153,5261,5477,5531,5639,5693,5801 %N A141963 Primes congruent to 23 mod 27. %H A141963 Vincenzo Librandi, <a href="/A141963/b141963.txt">Table of n, a(n) for n = 1..1000</a> %F A141963 a(n) ~ 18n log n. - _Charles R Greathouse IV_, Jul 02 2016 %t A141963 Select[Range[23, 30000, 27], PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Jun 21 2011 *) %o A141963 (Magma) [p: p in PrimesUpTo(7000) | p mod 27 eq 23 ]; // _Vincenzo Librandi_, Aug 16 2012 %o A141963 (PARI) is(n)=isprime(n) && n%27==23 \\ _Charles R Greathouse IV_, Jul 02 2016 %Y A141963 Cf. A000040, A141964, A141965. %K A141963 nonn,easy %O A141963 1,1 %A A141963 _N. J. A. Sloane_, Jul 11 2008