25128807667domain: NAppears in sequencesNumerator of 1/n + 2/(n-1) + 3/(n-2) + ... + (n-1)/2 + n.at n=23A027612Numerator - denominator in n-th harmonic number, 1 + 1/2 + 1/3 + ... + 1/n.at n=24A064169Numerator of the Harary number for the path graph P_n.at n=24A160048