A320171 - cp's OEIS frontend

A320171 Number of series-reduced rooted identity trees whose leaves are integer partitions whose multiset union is an integer partition of n.

n	a(n)
1	1
2	2
3	5
4	11
5	29
6	82
7	247
8	782
9	2579
10	8702
11	29975
12	104818
13	371111
14	1327307
15	4788687
16	17404838
17	63669763
18	234237605
19	866090021
20	3216738344
21	11995470691
22	44894977263
23	168582174353
24	634939697164
25	2398004674911
26	9079614633247
27	34458722286825
28	131059771522401

[1, 2, 5, 11, 29, 82, 247, 782, 2579, 8702, 29975, 104818, 371111, 1327307, 4788687, 17404838, 63669763, 234237605, 866090021, 3216738344, 11995470691, 44894977263, 168582174353, 634939697164, 2398004674911, 9079614633247, 34458722286825, 131059771522401]

cp's OEIS Frontend

A320171 Number of series-reduced rooted identity trees whose leaves are integer partitions whose multiset union is an integer partition of n.

Table of values

List of values