519437318400
domain: N
Appears in sequences
- Lah numbers: a(n) = n! * binomial(n-1, 4)/5!.at n=9A001777
- a(n) = denominator of Sum_{k=1..n} 1/k^2.at n=15A007407
- First diagonal of A027447.at n=16A027451
- Denominators of poly-Bernoulli numbers B_n^(k) with k=4.at n=15A027648
- Square of LCM of {1, 2, ..., n}.at n=15A051418
- Denominator(Sum_{i=1..n} 1/i^3)/denominator(Sum_{i=1..n} 1/i).at n=15A068589
- Denominator(sum(i=1,n,1/i^4))/denominator(sum(i=1,n,1/i^2)).at n=15A069046
- Denominator(sum(i=1,n,1/i^5))/denominator(sum(i=1,n,1/i^3)).at n=15A069053
- Denominators of squares of harmonic numbers A001008/A002805.at n=15A103931
- Denominators of row sums of rational triangle A120072/A120073.at n=14A120077
- As p runs through the primes, sequence gives denominator of Sum_{k=1..p-1} 1/k^2.at n=6A186720
- Denominator of Sum_{k=1..n} (-1)^(k+1)/k^2.at n=15A334580
- Denominator of the n-th partial sum of the generalized harmonic numbers A007406/A007407.at n=15A370774
- Denominator of the n-th partial sum of the squares of the harmonic numbers.at n=15A382813