20056049013
domain: N
Appears in sequences
- Squarefree part of lcm(1,...,n).at n=31A056839
- a(n) is the smallest positive integer m for which A070194(m) (i.e., the maximal gap in {k|gcd(k,m) = 1, 1 <= k <= m-1}) is n.at n=18A070971
- Least k such that the Jacobsthal function A048669(k) = n.at n=18A128759
- Denominators of r(n) = r(n-1) + r(n-2) + B_(n-2), where B_n is the n-th Bernoulli number A027641(n)/A027642(n).at n=32A228151
- a(n) = product of distinct terms of row n in triangle A255313.at n=14A255427
- a(1) = 1; thereafter a(n) = a(n-1) / lpf(n) if lpf(n) divides a(n-1), otherwise a(n) = a(n-1) * lpf(n), where lpf is the least prime factor function A020639.at n=32A337643