4227330

Appears in sequences

• Number of cases in which the first player gets killed in a Russian roulette game when 7 players use a gun with n chambers and the number of the bullets can be from 1 to n. In the game they do not rotate the cylinder after the game starts.at n=22A117302
• a(n) = (Product_{i=1..n-1} (2^i + 1)) modulo (2^n - 1).at n=27A219732