130013domain: NAppears in sequencesPositive numbers k such that k and 2*k are anagrams in base 5 (written in base 5).at n=20A023061Numbers k which are concatenations k=x//y such that x^2 + y^2 is a multiple of k.at n=36A162463Numbers n whose cubes are concatenations n^3 = x//y such that x is an anagram of y.at n=22A162946