A209612 - cp's OEIS frontend

A209612 Triangle read by rows: T(n,k) is the number of k-block noncrossing partitions of n-set up to rotations and reflections.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	1
12	2
13	4
14	2
15	1
16	1
17	3
18	8
19	8
20	3
21	1
22	1
23	3
24	12
25	17
26	12
27	3
28	1
29	1
30	4
31	19
32	41
33	41
34	19
35	4
36	1
37	1
38	4
39	27
40	78
41	116
42	78
43	27
44	4
45	1
46	1
47	5
48	38
49	148
50	298
51	298
52	148
53	38
54	5
55	1
56	1
57	5
58	50
59	250
60	680
61	932
62	680
63	250
64	50
65	5
66	1

[1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 4, 2, 1, 1, 3, 8, 8, 3, 1, 1, 3, 12, 17, 12, 3, 1, 1, 4, 19, 41, 41, 19, 4, 1, 1, 4, 27, 78, 116, 78, 27, 4, 1, 1, 5, 38, 148, 298, 298, 148, 38, 5, 1, 1, 5, 50, 250, 680, 932, 680, 250, 50, 5, 1]

cp's OEIS Frontend

A209612 Triangle read by rows: T(n,k) is the number of k-block noncrossing partitions of n-set up to rotations and reflections.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	1
12	2
13	4
14	2
15	1
16	1
17	3
18	8
19	8
20	3
21	1
22	1
23	3
24	12
25	17
26	12
27	3
28	1
29	1
30	4
31	19
32	41
33	41
34	19
35	4
36	1
37	1
38	4
39	27
40	78
41	116
42	78
43	27
44	4
45	1
46	1
47	5
48	38
49	148
50	298
51	298
52	148
53	38
54	5
55	1
56	1
57	5
58	50
59	250
60	680
61	932
62	680
63	250
64	50
65	5
66	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	1
12	2
13	4
14	2
15	1
16	1
17	3
18	8
19	8
20	3
21	1
22	1
23	3
24	12
25	17
26	12
27	3
28	1
29	1
30	4
31	19
32	41
33	41
34	19
35	4
36	1
37	1
38	4
39	27
40	78
41	116
42	78
43	27
44	4
45	1
46	1
47	5
48	38
49	148
50	298
51	298
52	148
53	38
54	5
55	1
56	1
57	5
58	50
59	250
60	680
61	932
62	680
63	250
64	50
65	5
66	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	1
12	2
13	4
14	2
15	1
16	1
17	3
18	8
19	8
20	3
21	1
22	1
23	3
24	12
25	17
26	12
27	3
28	1
29	1
30	4
31	19
32	41
33	41
34	19
35	4
36	1
37	1
38	4
39	27
40	78
41	116
42	78
43	27
44	4
45	1
46	1
47	5
48	38
49	148
50	298
51	298
52	148
53	38
54	5
55	1
56	1
57	5
58	50
59	250
60	680
61	932
62	680
63	250
64	50
65	5
66	1