Number of set partitions of [n] with alternating parity of elements and exactly nine blocks.
A305783
Number of set partitions of [n] with alternating parity of elements and exactly nine blocks.
Terms
- a(0) =1a(1) =9a(2) =61a(3) =359a(4) =2071a(5) =11521a(6) =64536a(7) =351890a(8) =1937292a(9) =10385051a(10) =56327364a(11) =297361209a(12) =1592259558a(13) =8294350334a(14) =43929021137a(15) =226237017737
External references
- oeis: A305783