Sum of the sizes of the ninth blocks in all set partitions of {1,2,...,n}.
A270501
Sum of the sizes of the ninth blocks in all set partitions of {1,2,...,n}.
Terms
- a(0) =1a(1) =47a(2) =1267a(3) =25820a(4) =443249a(5) =6782968a(6) =95737722a(7) =1274661371a(8) =16262852622a(9) =201150251360
External references
- oeis: A270501