7136640

Appears in sequences

• Triangle read by rows giving number of rooted labeled trees with n >= 2 nodes and height d >= 1.at n=33A034855
• a(n) = n!*(3*n^2 - 15*n + 10)/6.at n=5A034861
• a(n) = n!*(3*n^2 - 15*n + 10)/6, n > 4.at n=5A034862
• Let S(n)=sigma(|n|)/2-n; sequence gives numbers n such that S(S(S(S(n))))=n. May be called {1,2}-sociable number of orders 1 or 2 or 4.at n=18A114529
• Numbers n such that there exists an x!=n that makes {n,n,x,x} an amicable multiset.at n=11A259306
• Irregular triangular array, read by rows: row n shows the coefficients of the polynomial p(n,x) defined in Comments.at n=12A329441