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 A112853 #15 Jun 13 2024 09:43:49 %S A112853 2,6,14,25,114,188,193,361,712,1767,3195,4995,5682,6485,9937 %N A112853 Numbers k such that (2*k)!/k!-1 is prime. %C A112853 Next term is > 9680. %t A112853 Select[Range[7000], PrimeQ[(2#)!/#!-1]&] (* _James C. McMahon_, Jun 12 2024 *) %Y A112853 Cf. A112854 primes of the form (2*n)!/n!-1, A112855 (2*n)!/n!+1 is prime, A066726 (2*n)!/(n!)^2-1 is prime, A066699 (2*n)!/(n!)^2+1 is prime, A112861 (2*n)!/(2*(n!)^2)-1 is prime, A112863 (2*n)!/(2*(n!)^2)+1 is prime. %K A112853 hard,more,nonn %O A112853 1,1 %A A112853 _Hugo Pfoertner_, Sep 25 2005 %E A112853 a(15) from _Michael S. Branicky_, Jun 12 2024