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 A141931 #15 Apr 29 2025 04:51:39 %S A141931 31,131,181,281,331,431,631,881,1031,1181,1231,1381,1481,1531,1831, %T A141931 1931,2081,2131,2281,2381,2531,2731,3181,3331,3581,3631,3881,3931, %U A141931 4231,4481,4831,4931,5081,5231,5281,5381,5431,5531,5581,5881,5981,6131,6481,6581 %N A141931 Primes congruent to 6 mod 25. %C A141931 Primes congruent to 31 mod 50. - _Chai Wah Wu_, Apr 28 2025 %H A141931 Vincenzo Librandi, <a href="/A141931/b141931.txt">Table of n, a(n) for n = 1..1000</a> %F A141931 a(n) ~ 20n log n. - _Charles R Greathouse IV_, Jul 02 2016 %t A141931 Select[Range[6, 20000, 25], PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Jun 18 2011 *) %o A141931 (Magma) [p: p in PrimesUpTo(8000) | p mod 25 eq 6 ]; // _Vincenzo Librandi_, Aug 16 2012 %o A141931 (PARI) is(n)=isprime(n) && n%25==6 \\ _Charles R Greathouse IV_, Jul 02 2016 %Y A141931 Cf. A000040. %K A141931 nonn,easy %O A141931 1,1 %A A141931 _N. J. A. Sloane_, Jul 11 2008