Number of ways to arrange n books on 3 consecutive shelves leaving none of the shelves empty.
A200978
Number of ways to arrange n books on 3 consecutive shelves leaving none of the shelves empty.
Terms
- a(0) =6a(1) =72a(2) =720a(3) =7200a(4) =75600a(5) =846720a(6) =10160640a(7) =130636800a(8) =1796256000a(9) =26345088000a(10) =410983372800
External references
- oeis: A200978