344719domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of connected numbers (A029827) in the interval [2^(n-1)+1, 2^n].at n=21A036381a(n) is the least positive integer k such that Mordell's equation y^2 = x^3 - k has exactly n integer solutions with y >= 0.at n=14A392395Prime numbersat n=29556