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 A100497 #14 Feb 17 2023 07:41:26 %S A100497 0,2,3,4,6,8,10,12,16,19,22,43,44,45,52,67,76,117,130,151,169,208,232, %T A100497 262 %N A100497 Numbers n such that (2^n+1)^4-2 is a semiprime. %C A100497 a(20) >= 151. - _Hugo Pfoertner_, Jul 24 2019 %C A100497 a(25) >= 361. - _Tyler Busby_, Feb 17 2023 %H A100497 <a href="http://factordb.com/index.php?query=%282%5E361%2B1%29%5E4-2">Status of (2^361+1)^4-2 in factordb.com</a>. %t A100497 Select[Range[0,130],PrimeOmega[(2^#+1)^4-2]==2&] (* _Harvey P. Dale_, Sep 02 2016 *) %Y A100497 Cf. A100496, n such that (2^n+1)^4-2 is prime. %K A100497 nonn,more,hard %O A100497 1,2 %A A100497 _Jonathan Vos Post_, Nov 23 2004 %E A100497 Corrected by _Hugo Pfoertner_, Nov 25 2004 %E A100497 a(20)-a(24) from _Tyler Busby_, Feb 17 2023