Number of set partitions of [n] into exactly nine blocks such that all odd elements are in blocks with an odd index and all even elements are in blocks with an even index.
A274873
Number of set partitions of [n] into exactly nine blocks such that all odd elements are in blocks with an odd index and all even elements are in blocks with an even index.
Terms
- a(0) =1a(1) =4a(2) =70a(3) =280a(4) =2919a(5) =11676a(6) =94944a(7) =379776a(8) =2669361a(9) =10677444a(10) =68321994a(11) =273287976a(12) =1640345707a(13) =6561382828a(14) =37643205652a(15) =150572822608a(16) =836008721925
External references
- oeis: A274873