Number of entries in the fourth blocks of all set partitions of [n] when blocks are ordered by decreasing lengths.
A333061
Number of entries in the fourth blocks of all set partitions of [n] when blocks are ordered by decreasing lengths.
Terms
- a(0) =1a(1) =11a(2) =81a(3) =512a(4) =3151a(5) =20071a(6) =133853a(7) =924320a(8) =6551293a(9) =47529561a(10) =354259153a(11) =2725545695a(12) =21741995463a(13) =180198265559
External references
- oeis: A333061