Number of entries in the second last blocks of all set partitions of [n].
A286433
Number of entries in the second last blocks of all set partitions of [n].
Terms
- a(0) =1a(1) =6a(2) =25a(3) =98a(4) =399a(5) =1746a(6) =8271a(7) =42284a(8) =231939a(9) =1357128a(10) =8427181a(11) =55288860a(12) =381798629a(13) =2765917074a(14) =20960284277a(15) =165729739590
External references
- oeis: A286433