106645domain: NAppears in sequencesExpansion of g.f. 1/((1-6*x)*(1-10*x)*(1-11*x)).at n=4A020726Smallest composite x such that sigma(x) + 2n = sigma(x + 2n).at n=15A054905Smallest composite x such that sigma(x+2^n) = sigma(x) + 2^n.at n=4A054987G.f. A(x) satisfies A(x) = 1/( (1-x)^3 * (1 - x*A(x) - x^2*A'(x)) ).at n=6A386230