Partial sums of the squares of the ordered Bell numbers (number of preferential arrangements) A000670.
A217391
Partial sums of the squares of the ordered Bell numbers (number of preferential arrangements) A000670.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =180a(4) =5805a(5) =298486a(6) =22228975a(7) =2258856824a(8) =300194704049
External references
- oeis: A217391