19409079690
domain: N
Appears in sequences
- a(n) = lcm_{k=1..n} (lcm(n,n-1,...,n-k+2,n-k+1)/lcm(1,2,...,k)).at n=28A093432
- a(n) = lcm_{k=1..n} (lcm(n,n-1,...,n-k+2,n-k+1)/lcm(1,2,...,k)).at n=29A093432
- Numbers k where records occur for phi(k+1)/phi(k), where phi is the Euler totient function (A000010).at n=20A335069
- a(n) = lcm(denominator(p(n, x))), where p(n, x) are the rational polynomials defined in A342321.at n=29A343277