484848domain: NAppears in sequencesNumbers k whose digits can be divided into two contiguous parts, k = concatenate(x, y), such that k = |x^2 - y^2|.at n=15A113797Numbers k which are concatenations k = x//y such that y^2 - x^2 = k.at n=11A162700Terms of A338039 that are repeated concatenations of smaller integers.at n=5A338166