Number of entries in the third blocks of all set partitions of [n] when blocks are ordered by increasing lengths.
A332943
Number of entries in the third blocks of all set partitions of [n] when blocks are ordered by increasing lengths.
Terms
- a(0) =1a(1) =13a(2) =71a(3) =396a(4) =1877a(5) =9199a(6) =47371a(7) =253108a(8) =1420475a(9) =8598976a(10) =55100124a(11) =369764734a(12) =2614650820a(13) =19473708445a(14) =151503397725
External references
- oeis: A332943