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 A382094 #26 May 14 2025 10:50:48 %S A382094 0,1,2,4,5,10,11,28,40,110,124,826,871,1355,1540,2285,8908,20824, %T A382094 31715,61655,75920,96274,195871,233125,242594,252760,259825,349315 %N A382094 Integers k such that k*2^k + 3 is prime. %e A382094 4 is in the sequence because 4*2^4 + 3 = 67 is prime. %t A382094 Select[Range[0,5000],PrimeQ[#*2^#+3] &] (* _Stefano Spezia_, Mar 15 2025 *) %o A382094 (Magma) [k: k in [0..1000] | IsPrime(k*2^k+3)]; %Y A382094 Cf. A182373, A182375, A265121. %K A382094 nonn,more,hard %O A382094 1,3 %A A382094 _Juri-Stepan Gerasimov_, Mar 15 2025 %E A382094 a(18)-a(22) from _Michael S. Branicky_, Mar 15 2025 %E A382094 a(23)-a(25) from _Georg Grasegger_, Apr 15 2025 %E A382094 a(26)-a(28) from _Georg Grasegger_, May 14 2025