313592domain: NAppears in sequencesValues x for records of minima of the positive distance d between the seventh power of a positive integer x and the square of an integer y such that d = x^7 - y^2 (x <> k^2 and y <> k^7).at n=30A179785Number of permutations of [n] with a fixed point and/or a succession.at n=9A207819