A164341 - cp's OEIS frontend

A164341 Irregular triangle read by rows: a(n,m) counts the decompositions into involutions of a permutation that has a cycle structure given by the m-th partition of n.

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	4
8	3
9	6
10	4
11	10
12	5
13	4
14	6
15	6
16	6
17	8
18	26
19	6
20	5
21	8
22	12
23	8
24	6
25	20
26	12
27	12
28	20
29	76
30	7
31	6
32	10
33	12
34	10
35	8
36	12
37	18
38	16
39	12
40	20
41	30
42	24
43	52
44	232
45	8
46	7
47	12
48	15
49	20
50	12
51	10
52	12
53	24
54	24
55	20
56	16
57	24
58	18
59	76
60	40
61	24
62	40
63	78
64	60
65	152
66	764
67	9
68	8
69	14
70	18
71	20
72	14
73	12
74	15
75	20
76	30
77	24
78	54

[1, 2, 2, 3, 2, 4, 4, 3, 6, 4, 10, 5, 4, 6, 6, 6, 8, 26, 6, 5, 8, 12, 8, 6, 20, 12, 12, 20, 76, 7, 6, 10, 12, 10, 8, 12, 18, 16, 12, 20, 30, 24, 52, 232, 8, 7, 12, 15, 20, 12, 10, 12, 24, 24, 20, 16, 24, 18, 76, 40, 24, 40, 78, 60, 152, 764, 9, 8, 14, 18, 20, 14, 12, 15, 20, 30, 24, 54]

cp's OEIS Frontend

A164341 Irregular triangle read by rows: a(n,m) counts the decompositions into involutions of a permutation that has a cycle structure given by the m-th partition of n.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	4
8	3
9	6
10	4
11	10
12	5
13	4
14	6
15	6
16	6
17	8
18	26
19	6
20	5
21	8
22	12
23	8
24	6
25	20
26	12
27	12
28	20
29	76
30	7
31	6
32	10
33	12
34	10
35	8
36	12
37	18
38	16
39	12
40	20
41	30
42	24
43	52
44	232
45	8
46	7
47	12
48	15
49	20
50	12
51	10
52	12
53	24
54	24
55	20
56	16
57	24
58	18
59	76
60	40
61	24
62	40
63	78
64	60
65	152
66	764
67	9
68	8
69	14
70	18
71	20
72	14
73	12
74	15
75	20
76	30
77	24
78	54

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	4
8	3
9	6
10	4
11	10
12	5
13	4
14	6
15	6
16	6
17	8
18	26
19	6
20	5
21	8
22	12
23	8
24	6
25	20
26	12
27	12
28	20
29	76
30	7
31	6
32	10
33	12
34	10
35	8
36	12
37	18
38	16
39	12
40	20
41	30
42	24
43	52
44	232
45	8
46	7
47	12
48	15
49	20
50	12
51	10
52	12
53	24
54	24
55	20
56	16
57	24
58	18
59	76
60	40
61	24
62	40
63	78
64	60
65	152
66	764
67	9
68	8
69	14
70	18
71	20
72	14
73	12
74	15
75	20
76	30
77	24
78	54

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	4
8	3
9	6
10	4
11	10
12	5
13	4
14	6
15	6
16	6
17	8
18	26
19	6
20	5
21	8
22	12
23	8
24	6
25	20
26	12
27	12
28	20
29	76
30	7
31	6
32	10
33	12
34	10
35	8
36	12
37	18
38	16
39	12
40	20
41	30
42	24
43	52
44	232
45	8
46	7
47	12
48	15
49	20
50	12
51	10
52	12
53	24
54	24
55	20
56	16
57	24
58	18
59	76
60	40
61	24
62	40
63	78
64	60
65	152
66	764
67	9
68	8
69	14
70	18
71	20
72	14
73	12
74	15
75	20
76	30
77	24
78	54