Total sum of the sizes of all blocks with maximal element 3 in all set partitions of {1,2,...,n}.
A270757
Total sum of the sizes of all blocks with maximal element 3 in all set partitions of {1,2,...,n}.
Terms
- a(0) =9a(1) =16a(2) =41a(3) =127a(4) =456a(5) =1845a(6) =8257a(7) =40338a(8) =212983a(9) =1205911a(10) =7275802a(11) =46534535a(12) =314117861a(13) =2229489144a(14) =16584674293a(15) =128934314027
External references
- oeis: A270757