55835135

Appears in sequences

• a(n) = numerator of harmonic number H(n) = Sum_{i=1..n} 1/i.at n=19A001008
• Numerator of the n-th harmonic number H(n) divided by (n+1); a(n) = A001008(n) / ((n+1)*A002805(n)).at n=19A002547
• Numerator of absolute value of Sum_{k=1..n} (-1)^(k+1)*(2*k+1)*(Sum_{i=1..k} 1/i).at n=19A120284
• a(n) = numerator of sum{k=1 to n} 1/A127518(k).at n=19A127519
• Numerator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=1.at n=9A145609
• a(n) = squarefree part of A145609(n).at n=9A145738
• Denominator of H(n)/H(n-1), where H(n) is the n-th harmonic number = Sum_{k=1..n} 1/k.at n=19A193758
• Largest squarefree number dividing the numerator of harmonic number H(n).at n=19A382213