Number of arrangements of n labeled balls in n labeled columns where only 1 column may have more than 1 ball.
A086984
Number of arrangements of n labeled balls in n labeled columns where only 1 column may have more than 1 ball.
Terms
- a(0) =1a(1) =6a(2) =60a(3) =696a(4) =9120a(5) =134640a(6) =2227680a(7) =41005440a(8) =833172480a(9) =18546796800a(10) =449223667200
External references
- oeis: A086984