5173168

Appears in sequences

• a(n) = denominator of harmonic number H(n) = Sum_{i=1..n} 1/i.at n=20A002805
• a(n) = denominator of harmonic number H(n) = Sum_{i=1..n} 1/i.at n=21A002805
• Denominator of n * n-th harmonic number.at n=22A027611
• Denominator of Sum_{1<=k<=n, gcd(k,n)=1} 1/k.at n=22A069220
• Denominators of harmonic numbers when the numerators are divisible by squares of primes >= 5 in the case of Wolstenholme's Theorem.at n=6A076638
• Consider numbers which are denominators of at least one reduced rational sum{k=1 to m} 1/k^n, taken over all positive integers m and n (a sequence not yet in the database). Sequence gives denominators which occur more than once.at n=4A094515
• Denominator of 1^n/n + 2^n/(n-1) + 3^n/(n-2) + ... + (n-1)^n/2 + n^n/1.at n=21A120487
• a(n) = denominator of sum{k=1 to n} 1/A127518(k).at n=21A127520
• a(n) = floor((denominator of H(n))/n), where H(n) = Sum_{k=1..n} 1/k, the n-th harmonic number.at n=22A128438
• Denominator 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=10A145610
• Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=15.at n=9A145636
• Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=15.at n=10A145636
• Denominator of the Harary number for the cycle graph C_n.at n=42A160047
• As p runs through the primes, sequence gives denominator of Sum_{k=1..p-1} 1/k.at n=8A185399
• Minimal possible denominator for a sum of the form 1 +/- 1/2 +/- 1/3 +/- ... +/- 1/n.at n=18A232090
• Minimal possible denominator for a sum of the form 1 +/- 1/2 +/- 1/3 +/- ... +/- 1/n.at n=19A232090
• First bisection of harmonic numbers (denominators).at n=10A232181
• Denominators of 2*H(n)-H(n*(n+1)), a sequence the limit of which is gamma, the Euler-Mascheroni constant, where H(n) is the n-th harmonic number.at n=3A249646
• Denominator of sum of reciprocals of numbers less than n that do not divide n.at n=22A281086
• a(n) is the denominator of the asymptotic density of numbers divisible by their last digit in base n.at n=21A341432