116121600

Appears in sequences

• a(n) = n!/LCM{1, C(n-1,1), C(n-2,2), ..., C(n-[ n/2 ],[ n/2 ])}.at n=16A025562
• a(n) = 2^n*(2*n)!.at n=5A065140
• Product of the nonzero digital products of n for all the bases 1 to n (a 'total digital-product factorial').at n=16A131387
• a(0)=1; thereafter a(n) = n*a(n-1) if n is even, otherwise a(n) = 2*n*a(n-1).at n=10A232205
• Smallest number k such that the symmetric representation of sigma(k) has maximum width n for those k whose representation has nondecreasing width up to the diagonal.at n=29A250071
• Number of n X 2 arrays containing 2 copies of 0..n-1 with row sums equal.at n=10A268363
• a(n) is the number of positive divisors of A003266(n).at n=20A272122
• a(n) is the denominator of r(n), where r(n) = r(n-1) + r(n-2)/(2*(n-1)) with r(0) = 0, r(1) = 1.at n=11A287596
• 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=34A291909
• The n-volume of the unit regular n-simplex is sqrt(A364900(n))/a(n), with A364900(n) being squarefree.at n=10A364901
• Square array T(n, k) = denominator( zeta_r(2*n) * sqrt(A003658(k + 2)) / Pi^(4*n) ), read by antidiagonals, where zeta_r is the Dedekind zeta-function over r and r is the real quadratic field with discriminant A003658(k + 2).at n=11A370411
• a(n) = Product_{k=0..n} (n^2 + k^2)!.at n=2A371643