Alternating sums of the squares of the ordered Bell numbers (number of preferential arrangements) A000670.
A217392
Alternating sums of the squares of the ordered Bell numbers (number of preferential arrangements) A000670.
Terms
- a(0) =1a(1) =0a(2) =9a(3) =160a(4) =5465a(5) =287216a(6) =21643273a(7) =2214984576a(8) =295720862649
External references
- oeis: A217392