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 A265502 #24 Sep 08 2022 08:46:14 %S A265502 1,139,433,1563,2095,2254,2871,3751,4003,4338,4843,6015,6331,6933, %T A265502 7324,7345,7485,7719,7836,8070,8413,9018,9840,9898,9915,9931,10611, %U A265502 11215,11356,11418,11560,11740,12010,12673,13039,13056,13225,14136,14271,14380,14974,15084 %N A265502 Numbers n such that n*2^1279 - 1 is prime. %C A265502 The exponent of 2 in the expression, 1279, is a Mersenne exponent. %H A265502 Andrew Howroyd, <a href="/A265502/b265502.txt">Table of n, a(n) for n = 1..1000</a> %e A265502 n = 1 is a term since 2^1279 - 1 is prime (the 15th Mersenne prime). %t A265502 Select[Range@ 11500, PrimeQ[# 2^1279 - 1] &] (* _Michael De Vlieger_, Dec 09 2015 *) %o A265502 (MATLAB) %o A265502 if isprime(n*2^1279-1) %o A265502 disp(n) %o A265502 end %o A265502 (PARI) is(n)=ispseudoprime(n*2^1279 - 1) \\ _Anders Hellström_, Dec 09 2015 %o A265502 (Magma) [n: n in [1..10^4] |IsPrime(n*2^1279-1)]; // _Vincenzo Librandi_, Dec 10 2015 %Y A265502 Cf. A000043, A001348, A005122. %K A265502 nonn %O A265502 1,2 %A A265502 _Vardan Semerjyan_, Dec 09 2015 %E A265502 Terms a(31) and beyond from _Andrew Howroyd_, Dec 23 2019