31492domain: NAppears in sequencesSum of the cubes of the first n cubefree numbers.at n=17A114286Numbers n such that the sum of the proper divisors of n and n+1 equals either n or n+1.at n=22A130776Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.at n=21A192759