836352

Appears in sequences

• Signed double Pochhammer triangle: expansion of x(x-2)(x-4)..(x-2n+2).at n=29A039683
• Triangle read by rows: T(n,k) is the coefficient of x^k of the polynomial n(n-x)(n-2x)(n-3x)...(n-(n-1)x) (n>=1, 0<=k<=n-1).at n=34A123670
• (n-1)-st elementary symmetric function of {2,4,6,8,...,2n}.at n=6A203159
• Number of chordless cycles in the complete tripartite graph K_{n,n,n}.at n=32A297662
• Triangle, read by rows, each row n being defined by g.f. Product_{k=1..n} (k + x + 2*k*x^2), for n >= 0.at n=62A322891
• a(n) = Product_{d|n} lcm(d, sigma(d)) where sigma(k) is the sum of divisors of k (A000203).at n=32A334805
• Triangle read by rows. T(n, k) = n^k * |Stirling1(n, k)|.at n=38A355007