Number of pairs of partitions of {1,2,...,n} whose meet is the partition {{1}, {2}, ..., {n}}.
A059849
Number of pairs of partitions of {1,2,...,n} whose meet is the partition {{1}, {2}, ..., {n}}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =15a(4) =113a(5) =1153a(6) =15125a(7) =245829a(8) =4815403a(9) =111308699a(10) =2985997351a(11) =91712874487
External references
- oeis: A059849