A325889 - cp's OEIS frontend

A325889 Number of colored set partitions of [2n] where colors of the elements of subsets are in (weakly) increasing order and exactly n colors are used.

n	a(n)
0	1
1	2
2	122
3	30470
4	19946654
5	27291293442
6	67940872709600
7	280154891124993313
8	1787697422835498425966
9	16765591042116935170071062
10	221912878453525607344964295822
11	4012317533096874589918210188528948
12	96463460015261984561875523126569759208

[1, 2, 122, 30470, 19946654, 27291293442, 67940872709600, 280154891124993313, 1787697422835498425966, 16765591042116935170071062, 221912878453525607344964295822, 4012317533096874589918210188528948, 96463460015261984561875523126569759208]

cp's OEIS Frontend

A325889 Number of colored set partitions of [2n] where colors of the elements of subsets are in (weakly) increasing order and exactly n colors are used.

Table of values

List of values