5380841domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of distinct quadratic residues mod 3^n.at n=15A039300a(n) = A047848(6, n).at n=8A047854a(n) = ceiling(9^n/n).at n=7A129793Cogrowth sequence of the 16-element Pauli group C4 o D4 = <S,T,U | s^4, T^2, U^2, S^2(TU)^2, [S,T], [S,U]>.at n=8A377943Prime numbersat n=373118