Number of ways to put n labeled objects into n labeled boxes so that no two nonempty boxes are adjacent.
A219614
Number of ways to put n labeled objects into n labeled boxes so that no two nonempty boxes are adjacent.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =9a(4) =46a(5) =335a(6) =2786a(7) =28357a(8) =325382a(9) =4280859a(10) =62437882a(11) =1010306825a(12) =17852477006a(13) =343275422503
External references
- oeis: A219614