Central Peirce numbers. Number of set partitions of {1,2,..,2n+1} in which n+1 is the smallest of its block.
A094577
Central Peirce numbers. Number of set partitions of {1,2,..,2n+1} in which n+1 is the smallest of its block.
Terms
- a(0) =1a(1) =3a(2) =27a(3) =409a(4) =9089a(5) =272947a(6) =10515147a(7) =501178937a(8) =28773452321
External references
- oeis: A094577