2485513domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = floor(2^(n-1)/n).at n=26A006788Nearest integer to 2^(n-1)/n.at n=26A054650a(n) = floor((1 + 4^n)/(1 + 2*n)).at n=12A191637Prime numbersat n=182082