2882880
domain: N
Appears in sequences
- Denominators of coefficients for numerical differentiation.at n=14A002548
- Numbers k that are repdigits in more bases (smaller than k) than any smaller number.at n=40A066044
- a(1) = 1, a(n) = a(n-1) times smallest prime factor of n.at n=12A072486
- Least k such that n*prime(k) <= k*tau(k).at n=19A073066
- Highly composite numbers k such that 2*k is not a highly composite number.at n=14A073771
- Smallest integer value of n!/(2!3!...p!), where denominator contains product of factorials of primes in increasing order.at n=14A088302
- Duplicate of A088302.at n=14A096073
- SuperRefactorable numbers: m=A005179(n) such that k=m/n is an integer.at n=37A110821
- Denominator of x(n) = Sum_{k=1..n} ((odd part of k)/(k^2)).at n=14A111930
- Triangle T(n, k) = (n+2)!*(n*(n+1)*(2*n+1)/6)!/( (k^2)! * abs(2 + 2*k^2 - (n*(n + 1)*(2*n+1)/6))! ), read by rows.at n=7A123147
- Where records occur in A018892.at n=35A126098
- Numbers that can be written as (a^2-1)(b^2-1) in three or more distinct ways.at n=19A134856
- Triangle T(n, k) = H(n, k+1) - 2*H(n, k) - H(n, k-1), where H(n, k) = A060821(n+3, k), read by rows.at n=29A140873
- A product of quotients of factorials.at n=12A161887
- Areas for which there are more tatami-free rooms (cf. A165633) than for any smaller size.at n=26A165762
- Earliest sequence such that xy | a(x+y) for all x>=1, y>=1.at n=15A169900
- Numbers that set a record for number of even divisors: a(n) = 2*A002182(n).at n=39A181808
- Numbers n such that both n and n/2 are highly composite (A002182).at n=25A181809
- Members of A025487 whose prime signature is self-conjugate (as a partition).at n=17A181825
- a(n) = h(1)*h(2)*...*h(n), where h(i) = i/[g(i/2)*g(i/4)*g(i/8)*...] and g(x) = x if x is an integer and g(x) = 1 otherwise.at n=14A185021