Number of series-reduced rooted identity trees whose leaves are integer partitions whose multiset union is an integer partition of n.
A320171
Number of series-reduced rooted identity trees whose leaves are integer partitions whose multiset union is an integer partition of n.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =11a(4) =29a(5) =82a(6) =247a(7) =782a(8) =2579a(9) =8702a(10) =29975a(11) =104818a(12) =371111a(13) =1327307a(14) =4788687a(15) =17404838a(16) =63669763a(17) =234237605a(18) =866090021a(19) =3216738344a(20) =11995470691a(21) =44894977263a(22) =168582174353a(23) =634939697164
External references
- oeis: A320171