90504

Appears in sequences

• A symmetrical triangle sequence:t(n,m)=(-1)^m*(n - m)!*Binomial[n - 1, m] + (-1)^(n - m + 1)*(n - (n - m + 1))!*Binomial[n - 1, n - m + 1].at n=30A176862
• A symmetrical triangle sequence:t(n,m)=(-1)^m*(n - m)!*Binomial[n - 1, m] + (-1)^(n - m + 1)*(n - (n - m + 1))!*Binomial[n - 1, n - m + 1].at n=33A176862
• Expansion of o.g.f. 1/(1 - 4*x - 6*x^2 - 4*x^3 - x^4).at n=7A374454