129729600

Appears in sequences

• Distinct elements of A045948.at n=15A048148
• a(n) = Product_{k=1..n} rad(k), where rad(n) is the product of distinct prime factors of n, cf. A007947.at n=13A048803
• Triangle read by rows: T(n,d) = (n!/d!)*(n+1)*binomial(2n-d+1,n+1)/(n-d+1) (0 <= d <= n).at n=38A123225
• Number of inversions in all fixed-point-free involutions of {1,2,...,2n}.at n=8A161124
• Small factors of some highly composite numbers.at n=27A161894
• Small factors of some highly composite numbers.at n=28A161894
• Number of multiset permutations of the n initial elements of A005229 with additional element A005229(0)=1.at n=12A169638
• Positive integers with more highly composite divisors (A002182) than any smaller positive integer.at n=27A181806
• Denominators of poly-Cauchy numbers of the second kind hat c_n^(2).at n=14A219247
• Denominators of poly-Cauchy numbers c_n^(2).at n=14A224094
• Positions of records in A266342.at n=20A266343
• Triangle read by rows: T(n,k) (n>=5, k=3..n-2) is the number of topologies t on n points having exactly k open sets such that t contains exactly one open set of size m for each m in {0,4,5,6,...,s,n} where s is the size of the largest proper open set in t.at n=43A268222
• Partial products of A007429 (Sum_{d|n} sigma(d)).at n=8A280078
• Denominator of the sum of inverse products of cycle sizes in all permutations of [n].at n=13A323291
• Denominator of the sum of inverse products of parts in all compositions of n.at n=13A323340
• Numbers k with a record value of tau(tau(k)) (A010553), where tau(k) is the number of divisors of k (A000005).at n=14A335831
• a(n) = n! / (2 * floor(n/2)!).at n=13A355989
• Expansion of 1/((1 - x)^6 - 2*x^6).at n=23A375165
• a(n) = (1/n) * Product_{k=1..n} radical(k) for n >= 1, a(0) = 1, where radical(n) is the product of distinct prime factors of n, cf. A007947.at n=14A387140