4626720

Appears in sequences

• Numbers x such that there exist a pair y, n with x < y, x != n and y != n that makes {x,y,n,n} an amicable multiset.at n=12A273970
• Triangle read by rows: T(n, m) = A285061(n, m)*m!, 0 <= m <= n.at n=30A285066
• E.g.f.: Product_{k>=1} 1/(1 - x^(3*k-1)/(3*k-1)).at n=11A326755
• Triangle read by rows: T(n,k) is the number of labeled weakly graded (ranked) posets with n elements and rank k.at n=42A361951