A327022 - cp's OEIS frontend

A327022 Partition triangle read by rows. Number of ordered set partitions of the set {1, 2, ..., 2*n} with all block sizes divisible by 2.

n	a(n)
0	1
1	1
2	1
3	6
4	1
5	30
6	90
7	1
8	56
9	70
10	1260
11	2520
12	1
13	90
14	420
15	3780
16	9450
17	75600
18	113400
19	1
20	132
21	990
22	924
23	8910
24	83160
25	34650
26	332640
27	1247400
28	6237000
29	7484400
30	1
31	182
32	2002
33	6006
34	18018
35	270270
36	252252
37	630630
38	1081080
39	15135120
40	12612600
41	37837800
42	189189000
43	681080400
44	681080400

[1, 1, 1, 6, 1, 30, 90, 1, 56, 70, 1260, 2520, 1, 90, 420, 3780, 9450, 75600, 113400, 1, 132, 990, 924, 8910, 83160, 34650, 332640, 1247400, 6237000, 7484400, 1, 182, 2002, 6006, 18018, 270270, 252252, 630630, 1081080, 15135120, 12612600, 37837800, 189189000, 681080400, 681080400]

cp's OEIS Frontend

A327022 Partition triangle read by rows. Number of ordered set partitions of the set {1, 2, ..., 2*n} with all block sizes divisible by 2.

Table of values

List of values