71051domain: NAppears in sequencesa(n) = [ 3rd elementary symmetric function of {log(k)} ], k = 2,3,...,n.at n=27A025203a(n) = 58*n^2 + 1.at n=35A158666Numbers n such that m=(n^2+1)/2, p=(m^2+1)/2 and q=(p^2+1)/2 are all prime.at n=30A188546