990874363

Appears in sequences

• Numerator of 1/n + 2/(n-1) + 3/(n-2) + ... + (n-1)/2 + n.at n=22A027612
• Numerator - denominator in n-th harmonic number, 1 + 1/2 + 1/3 + ... + 1/n.at n=23A064169
• Numerator of the Harary number for the path graph P_n.at n=23A160048