A325482 - cp's OEIS frontend

A325482 Number of colored set partitions of [n] where colors of the elements of subsets are distinct and in increasing order and exactly two colors are used.

n	a(n)
2	3
3	12
4	41
5	140
6	497
7	1848
8	7191
9	29184
10	123107
11	538076
12	2430353
13	11317644
14	54229905
15	266906856
16	1347262319
17	6965034368
18	36833528195
19	199037675052
20	1097912385849
21	6176578272780
22	35409316648433
23	206703355298072
24	1227820993510151
25	7416522514174080

[3, 12, 41, 140, 497, 1848, 7191, 29184, 123107, 538076, 2430353, 11317644, 54229905, 266906856, 1347262319, 6965034368, 36833528195, 199037675052, 1097912385849, 6176578272780, 35409316648433, 206703355298072, 1227820993510151, 7416522514174080]

cp's OEIS Frontend

A325482 Number of colored set partitions of [n] where colors of the elements of subsets are distinct and in increasing order and exactly two colors are used.

Table of values

List of values