54260455193
domain: N
Appears in sequences
- a(n) = (1/1 - 1/2 + ... + (-1)^(n-1)/n)*lcm{1..n}.at n=27A025530
- Numerator of the fraction n*Sum_{k=1..n} 1/(n+k).at n=13A117731
- Numerator of the product of n and the n-th alternating harmonic number, Sum_{k=1..n} (-1)^(k+1)/k.at n=27A119787
- Absolute value of numerator of the sum of all elements of the n X n matrix M with M[i,j] = (-1)^(i+j)*i/j for i,j = 1..n.at n=27A120301