42822903domain: NAppears in sequencesa(n) = (1/1 + 1/2 + ... + 1/n)*lcm{1,2,...,n}.at n=17A025529Numerator of n*HarmonicNumber(n).at n=17A096617Numerator of absolute value of Sum_{k=1..n} (-1)^(k+1)*(2*k+1)*(Sum_{i=1..k} 1/i).at n=16A120284a(n) = numerator of Sum_{i=1..n} Sum_{j=1..n} (1/i + 1/j).at n=17A368810