200560490130
domain: N
Appears in sequences
- Primorial numbers (first definition): product of first n primes. Sometimes written prime(n)#.at n=11A002110
- Primorial numbers (second definition): n# = product of primes <= n.at n=32A034386
- Primorial numbers (second definition): n# = product of primes <= n.at n=31A034386
- Denominators of partial sums of Bernoulli numbers B_{2n} = A000367/A002445.at n=17A035077
- Squarefree kernels of distinct values of lcm(1,...,m) (A051451).at n=18A056603
- Squarefree kernels of distinct values of lcm(1,...,m) (A051451).at n=17A056603
- Denominators of partial sums of reciprocals of primorial numbers.at n=10A064647
- a(1)=1; for n > 0, a(n+1) = rad(a(n))*n where rad=A007947.at n=31A066332
- Denominator of Sum_{k=1..n} phi(k)/k.at n=32A072155
- Denominator of Sum_{k=1..n} phi(k)/k.at n=31A072155
- Denominator of b(n) = Sum_{k'<=n} 1/k', where k' denotes the squarefree numbers.at n=30A072983
- Denominator of b(n) = Sum_{k'<=n} 1/k', where k' denotes the squarefree numbers.at n=31A072983
- First multiple of n in A025487.at n=30A073039
- Smallest n-digit squarefree number with maximum number of prime divisors.at n=11A074111
- Smallest multiple of n with n distinct prime divisors.at n=10A076926
- Smallest number beginning with 2 and having exactly n distinct prime divisors.at n=10A077327
- Product of the primes less than the greatest prime factor of n but not dividing n.at n=36A083720
- Duplicate of A034386.at n=31A083907
- Duplicate of A034386.at n=30A083907
- Sequence of primorials P# (cf. A002110) such that j*P# has twin prime neighbors for some j with 0 < j < prime following P.at n=31A087651