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 A387145 #11 Aug 20 2025 09:25:26 %S A387145 4,2,6,150,3,60,4,40,19,2,2,12450,8,2,5,4590,5,96,5,420,2,12,2 %N A387145 a(n) is the least k>1 such that bigomega(k^n-1) = bigomega(k^n+1) with bigomega=A001222. %C A387145 a(24)...a(39): >3300, 3, 18, 33, >1000, 2, 32, 3, >625, 6, 13, 8, >1000, 4, 32, 2. %o A387145 (PARI) a387145(n) = for(k=2, oo, if(bigomega(k^n-1)==bigomega(k^n+1), return(k))) %Y A387145 Cf. A001222, A385315, A387144. %K A387145 nonn,hard,more,new %O A387145 1,1 %A A387145 _Hugo Pfoertner_, Aug 18 2025