I am not considering \((n!)!\).
Number Theory
Level
1
\(1!! + 1\) is even.
\(3!! +1\) is even.
\(5!! + 1 \) is even.
\(7!! +1\) is even.
\(9!! +1\) is even.
Is it true that \(n!! + 1\) is always an even number for all positive odd integers \(n?\)
by
Munem Sahariar