309561680403
domain: N
Appears in sequences
- Numerator of the product of the n-th triangular number and the n-th harmonic number.at n=25A119786
- Numerator of absolute value of Sum_{k=1..n} (-1)^(k+1)*(2*k+1)*(Sum_{i=1..k} 1/i).at n=25A120284
- Denominator of H(n)/H(n-1), where H(n) is the n-th harmonic number = Sum_{k=1..n} 1/k.at n=25A193758
- a(n) = A003418(n+1)*H(n), where H(n) = 1 + 1/2 + ... + 1/n is the n-th harmonic number.at n=25A379561