903210

Appears in sequences

• Triangle read by rows in which row n contains first n numbers with exactly n distinct prime factors.at n=27A048692
• a(n) is the n-th number to have n distinct prime factors.at n=6A073329
• Smallest number beginning with 9 and having exactly n distinct prime divisors.at n=6A077334
• Duplicate of A073329.at n=6A079856
• First occurrence (*2) of n in A088627 - or - least number that yields n different primes if you factorize it in all possible ways in two factors and add these factors.at n=35A091350
• Smallest number beginning with 9 that is the product of exactly n distinct primes.at n=6A106419
• Products of 7 distinct primes (squarefree 7-almost primes).at n=6A123321
• Numbers that are divisible by exactly 7 distinct primes.at n=6A176655
• Largest number that can be encoded as Product_{i:lambda} prime(i) for a partition lambda of n into distinct parts.at n=31A246868
• a(n) = n*(n + 1)*(n + 2)*(n + 3)*(n^2 - n + 5)/120.at n=20A256860
• T(n, k) is the largest number that can be formed by multiplying k primes prime(i1+0),...,prime(ik+k-1) such that i1+...+ik = n. Triangle read by rows.at n=51A274608
• 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=19A288813
• Unitary totient superdeficient numbers: numbers n > 1 such that s(n)/n < s(m)/m for all m < n, where s is the sum of iterated uphi (A047994).at n=12A291174
• Number T(n,k) of colored compositions of n using all colors of a k-set such that all parts have different color patterns and the patterns for parts i have i distinct colors in increasing order; triangle T(n,k), n>=0, min(j:A001787(j)>=n)<=k<=n, read by rows.at n=23A327583
• Least k such that Sum_{i=0..n} k^n / i! is a positive integer.at n=25A330030
• Product of all distinct least part primes from all partitions of n into prime parts.at n=46A333129
• a(n) is the n-th squarefree number having n prime factors.at n=6A340467
• Numbers k for which rank of the elliptic curve y^2 = x^3 - 432*k^2 is 5.at n=4A359687