5738040

Appears in sequences

• Expansion of e.g.f.: x^3*(exp(x)-1)^3.at n=11A052784
• 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=15A114529
• Numbers n such that there exists an x!=n that makes {n,n,x,x} an amicable multiset.at n=8A259306