A124322 - cp's OEIS frontend

A124322 Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} (or of any n-set) having k blocks of even size (0<=k<=floor(n/2)).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	3
6	5
7	7
8	3
9	12
10	25
11	15
12	37
13	91
14	60
15	15
16	128
17	329
18	315
19	105
20	457
21	1415
22	1533
23	630
24	105
25	1872
26	6297
27	7623
28	4410
29	945
30	8169
31	29431
32	42150
33	27405
34	7875
35	945
36	37600
37	151085
38	233475
39	176715
40	69300
41	10395
42	188685
43	802099
44	1365243
45	1199220
46	533610

[1, 1, 1, 1, 2, 3, 5, 7, 3, 12, 25, 15, 37, 91, 60, 15, 128, 329, 315, 105, 457, 1415, 1533, 630, 105, 1872, 6297, 7623, 4410, 945, 8169, 29431, 42150, 27405, 7875, 945, 37600, 151085, 233475, 176715, 69300, 10395, 188685, 802099, 1365243, 1199220, 533610]

cp's OEIS Frontend

A124322 Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} (or of any n-set) having k blocks of even size (0<=k<=floor(n/2)).

Table of values

List of values