1143072

Appears in sequences

• Smaller central (median) divisor of n!.at n=14A060776
• Duplicate of A060776.at n=14A061055
• Powerful numbers (definition 1) sandwiched between twin primes.at n=29A113839
• Averages of twin prime pairs k such that k*2 and k/2 are squares.at n=31A154670
• a(n) = n^6*(n+1)^2/2.at n=6A163276
• Triangular array read by rows: T(n,k) is the number of elements x in {1,2,...,n} such that |(f^-1)(x)| = k over all functions f:{1,2,...,n}->{1,2,...,n}; n>=0, 0<=k<=n.at n=30A210457
• Sum of cubes of the first n even numbers (A016743).at n=27A254371
• Theta series of the 12-dimensional lattice of hyper-roots D_3(SU(3)).at n=19A288488
• Triangle read by rows: T(n,k) is the coefficient of x^(2*k) in the cycle polynomial of the complete bipartite graph K_{n,n}, 1 <= k <= n.at n=39A291909
• a(n) = Product_{d|n} lcm(tau(d), sigma(d)) where tau(k) is the number of divisors of k (A000005) and sigma(k) is the sum of divisors of k (A000203).at n=19A334806
• Triangle read by rows: T(n, k) = floor(binomial(n, k - 1) * (k - 1)^(k - 1) * k *(n - k + 1)^(n - k) / 2).at n=35A369025
• a(n) = floor(n^2 * (n - 1)^(n - 1) / 2).at n=7A369027
• Triangle read by rows: T(n, k) = floor(binomial(n, k - 1) * (k - 1)^(k - 1) * n * (n - k + 1)^(n - k) / 2).at n=35A369072
• Obverse convolution (n)**A000201; see Comments.at n=6A374861
• Nonprimes k such that sopfr(k) = rad(k), where sopfr(k) is sum of the prime factors of k (counting multiplicity), and rad(k) is the product of its distinct prime factors.at n=19A386916