827639domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers z such that x^2 + y^7 = z^2 (with positive integers x and y) and gcd(x, y, z) = 1.at n=18A293693Expansion of Sum_{k>=0} (k * x * (1 + k*x^3))^k.at n=7A360731Expansion of Sum_{p prime} x^p/(1 - (p*x)^p).at n=13A373459Prime numbersat n=65995