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 A367572 #19 Aug 29 2024 12:14:29 %S A367572 5,7,49,165,251,345,385,945,949,1001,1963,2113,2249,3751,4381,4911, %T A367572 5133,10039,29693,34901,73885,99319,104883,113613 %N A367572 Numbers k such that k^8*2^k - 1 is a prime. %t A367572 Select[Range[5000], PrimeQ[#^8*2^# - 1] &] (* _Amiram Eldar_, Nov 23 2023 *) %o A367572 (Magma) [k: k in [1..4000] | IsPrime(k^8*2^k-1)]; %Y A367572 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), A367478 (m = 6), A367561 (m = 7), this sequence (m = 8). %K A367572 nonn,more %O A367572 1,1 %A A367572 _Juri-Stepan Gerasimov_, Nov 23 2023 %E A367572 a(19)-a(20) from _Michael S. Branicky_, Nov 23 2023 %E A367572 a(21) from _Michael S. Branicky_, Nov 25 2023 %E A367572 a(22)-a(24) from _Michael S. Branicky_, Aug 29 2024