39292domain: NAppears in sequencesa(n) = 4*n^3 + 5*n^2 + 2*n + 1.at n=21A204674Factors k > 0 such that the polynomial k*x^2 + 1 produces a record of its Hardy-Littlewood constant.at n=13A331945Expansion of e.g.f. (exp(x)-1)^2*(x+x^2/2).at n=11A360588Numbers k such that k + A224787(k) is a square.at n=18A386640