51094domain: NAppears in sequencesNumber of stars of visual magnitude n.at n=9A072171Number of solutions to c(1)*prime(1)+...+c(2n-1)*prime(2n-1) = -2, where c(i) = +-1 for i > 1, c(1) = 1.at n=12A261057Maximal coefficient of (1 + x^3) * (1 + x^5) * (1 + x^7) * ... * (1 + x^prime(n)).at n=25A369708