9189180

Appears in sequences

• a(n) = 14*(n+1)*binomial(n+4,8).at n=10A027804
• a(n) = 143*(n+1)*binomial(n+4,13)/2.at n=5A027809
• First differences of sequence of primorials.at n=7A061720
• a(1)=1; for n > 0, a(n+1) = rad(a(n))*n where rad=A007947.at n=18A066332
• Numbers with exactly 7 distinct prime divisors {2,3,5,7,11,13,17}.at n=17A147574
• Triangle read by rows: T(n, k) = v(n, k)*((1/v(n, k)) mod prime(k)), where v(n, k) = (Product_{j=1..n} prime(j))/prime(k), n >= 1, 1 <= k <= n.at n=35A240673
• Smallest number whose divisors have n non-singleton runs.at n=17A328510
• Numbers k such that A065642(k) = A081761(k).at n=20A340306
• Numbers k that are neither squarefree nor prime powers such that A119288(k) <= k/A007947(k) < A053669(k) and k has a primorial kernel but is not a product of primorials.at n=33A369419
• Denominators of the partial sums of the reciprocals of the sum of unitary divisors function (A034448).at n=33A379514
• Right edge of triangle A240673: a(n) = A002110(n-1) * A079276(n).at n=7A391734