17160990

Appears in sequences

• Triangle read by rows in which row n contains first n numbers with exactly n distinct prime factors.at n=34A048692
• Squarefree kernel of lcm(binomial(n,0), ..., binomial(n,n)).at n=25A056606
• 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=29A070971
• Smallest number with n distinct prime divisors which is the average of a twin prime pair.at n=7A075590
• Smallest squarefree number with n prime divisors which is the average of a twin prime pair.at n=6A075591
• Duplicate of A075590.at n=7A088255
• Products of 8 distinct primes (squarefree 8-almost primes).at n=6A123322
• Least k such that the Jacobsthal function A048669(k) = n.at n=29A128759
• Product of primes appearing in the factorization of n! with even exponents.at n=48A240502
• Product of primes appearing in the factorization of n! with even exponents.at n=49A240502
• Largest number that can be encoded as Product_{i:lambda} prime(i) for a partition lambda of n into distinct parts.at n=39A246868
• "Near Primorial" numbers.at n=29A259629
• Irregular triangle read by rows: T(m, k) is the list of squarefree numbers A002110(m) < t < 2*A002110(m) such that A001221(t) = m.at n=27A288813
• Least k such that Sum_{i=0..n} k^n / i! is a positive integer.at n=23A330030
• Numbers k with a record number of divisors d < sqrt(k) such that d + k/d is prime.at n=20A331665
• Least k such that Sum_{i=1..n} (-k)^i / i is a positive integer.at n=25A333073
• Least k such that Sum_{i=1..n} (-k)^i / i is a positive integer.at n=26A333073
• a(n) is the least positive integer k such that it has exactly n triples of divisors (d1, d2, d3) such that they are pairwise coprime and d1 < d2 < d3 < 2*d1.at n=12A336629
• Numbers k such that omega(k) = 8.at n=6A348072
• Triangle read by rows. T(n, k) = (1/2) * C(n, k) * C(3*n - 1, n) for n > 0 and T(0, 0) = 1.at n=40A360560