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 A108318 #15 Oct 01 2024 18:38:19 %S A108318 2,3,4,5,7,11,15,26,52,116,359,1547,2465 %N A108318 Numbers k such that (k+1)*k^k - 1 is prime. %C A108318 a(14) > 15000. - _Michael S. Branicky_, Oct 01 2024 %e A108318 15 is in the sequence because (15+1)*15^15-1 = 16*15^15-1 = 7006302246093749999, which is prime. %t A108318 Select[Range[1000], PrimeQ[(# + 1) #^# - 1] &] (* _Vincenzo Librandi_, Oct 23 2014 *) %o A108318 (PARI) isok(n) = isprime((n+1)*n^n-1); \\ _Michel Marcus_, Oct 23 2014 %o A108318 (Magma) [n: n in [1..1000] |IsPrime((n+1)*n^n-1)]; // _Vincenzo Librandi_, Oct 23 2014 %Y A108318 Cf. A108879. %K A108318 more,nonn %O A108318 1,1 %A A108318 _Ray G. Opao_, Jun 30 2005