Total sum of the sizes of all blocks with minimal element 4 in all set partitions of {1,2,...,n}.
A270767
Total sum of the sizes of all blocks with minimal element 4 in all set partitions of {1,2,...,n}.
Terms
- a(0) =5a(1) =25a(2) =127a(3) =670a(4) =3702a(5) =21485a(6) =131007a(7) =838485a(8) =5624233a(9) =39465366a(10) =289162042a(11) =2208190845a(12) =17544083557a(13) =144774580209
External references
- oeis: A270767