16823872domain: NAppears in sequencesNumbers of the form a^a + b^b, a >= b > 0.at n=33A066846Numbers of the form a^a + b^b, with a > b > 0.at n=26A218346a(n) = Sum_{p|n, p prime} (n/p)^lcm(p,n/p).at n=11A345313Numbers of the form x^x + y^y, 1 < x < y.at n=19A385614