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 A382370 #18 Apr 05 2025 16:40:45 %S A382370 3,4,5,7,10,11,21,46,59,839,21920 %N A382370 Numbers k such that (k - 1)^(k + 1) - k is prime. %C A382370 The corresponding primes are 13, 239, 4091, 1679609, 31381059599, 999999999989, 41943039999999999999999999979, ... %t A382370 Select[Range[1000], PrimeQ[(#-1)^(#+1)-#] &] (* _Stefano Spezia_, Mar 30 2025 *) %o A382370 (Magma) [k: k in [2..500] | IsPrime((k-1)^(k+1)-k)]; %Y A382370 Cf. A238378, A240532. %K A382370 nonn,more %O A382370 1,1 %A A382370 _Juri-Stepan Gerasimov_, Mar 23 2025 %E A382370 a(11) from _Michael S. Branicky_, Mar 25 2025