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 A367102 #31 Nov 10 2023 11:43:29 %S A367102 3,29,43,83,133,209,271,329,415,727,2437,5673,6879,7813,8125,11931, %T A367102 29433,29491,38397,91141,99459,110935,127247 %N A367102 Numbers k such that k^4*2^k - 1 is a prime. %t A367102 Select[Range[6000], PrimeQ[#^4*2^# - 1] &] (* _Amiram Eldar_, Nov 05 2023 *) %o A367102 (Magma) [k: k in [1..500] | IsPrime(k^4*2^k-1)]; %Y A367102 Numbers k such that k^m*2^k - 1 is prime: A000043 (m = 0), A002234 (m = 1), A058781 (m = 2), A367037 (m = 3), this sequence (m = 4). %K A367102 nonn,more %O A367102 1,1 %A A367102 _Juri-Stepan Gerasimov_, Nov 04 2023 %E A367102 a(17)-a(18) from _Amiram Eldar_, Nov 05 2023 %E A367102 a(19) from _Michael S. Branicky_, Nov 05 2023 %E A367102 a(20)-a(23) from _Hugo Pfoertner_, Nov 08 2023, Nov 10 2023