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 A367478 #19 Nov 21 2023 17:16:36 %S A367478 37,43,167,217,239,349,581,1297,5183,9119,10589,15205,18745,25687, %T A367478 26609,33667,35663,73603,82501,89269 %N A367478 Numbers k such that k^6*2^k - 1 is a prime. %t A367478 Select[Range[6000], PrimeQ[#^6*2^# - 1] &] (* _Amiram Eldar_, Nov 19 2023 *) %o A367478 (Magma) [k: k in [1..1000] | IsPrime(k^6*2^k-1)]; %Y A367478 Numbers k such that k^m*2^k - 1 is a prime: A000043 (m = 0), A002234 (m = 1), A058781 (m = 2), A367037 (m = 3), A367102 (m = 4), A367464 (m = 5), this sequence (m = 6). %K A367478 nonn,more %O A367478 1,1 %A A367478 _Juri-Stepan Gerasimov_, Nov 19 2023 %E A367478 a(12) inserted by and a(14)-a(17) from _Michael S. Branicky_, Nov 19 2023 %E A367478 a(18)-a(20) from _Michael S. Branicky_, Nov 21 2023