A204387 - cp's OEIS frontend

A204387 Triangle read by rows: T(n,k) is number of noncrossing trees with k edges and path-length n, n >= 1, 1 <= k <= n.

n	a(n)
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	0
9	4
10	1
11	0
12	0
13	3
14	6
15	1
16	0
17	0
18	4
19	10
20	8
21	1
22	0
23	0
24	0
25	12
26	21
27	10
28	1
29	0
30	0
31	0
32	12
33	32
34	36
35	12
36	1
37	0
38	0
39	0
40	6
41	45
42	72
43	55
44	14
45	1
46	0
47	0
48	0
49	8
50	36
51	119
52	140
53	78
54	16
55	1
56	0
57	0
58	0
59	0
60	46
61	144
62	270
63	244
64	105
65	18
66	1
67	0
68	0
69	0
70	0
71	32
72	164
73	416
74	550
75	392
76	136
77	20
78	1

[1, 0, 1, 0, 2, 1, 0, 0, 4, 1, 0, 0, 3, 6, 1, 0, 0, 4, 10, 8, 1, 0, 0, 0, 12, 21, 10, 1, 0, 0, 0, 12, 32, 36, 12, 1, 0, 0, 0, 6, 45, 72, 55, 14, 1, 0, 0, 0, 8, 36, 119, 140, 78, 16, 1, 0, 0, 0, 0, 46, 144, 270, 244, 105, 18, 1, 0, 0, 0, 0, 32, 164, 416, 550, 392, 136, 20, 1]

cp's OEIS Frontend

A204387 Triangle read by rows: T(n,k) is number of noncrossing trees with k edges and path-length n, n >= 1, 1 <= k <= n.

Table of values

List of values

n	a(n)
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	0
9	4
10	1
11	0
12	0
13	3
14	6
15	1
16	0
17	0
18	4
19	10
20	8
21	1
22	0
23	0
24	0
25	12
26	21
27	10
28	1
29	0
30	0
31	0
32	12
33	32
34	36
35	12
36	1
37	0
38	0
39	0
40	6
41	45
42	72
43	55
44	14
45	1
46	0
47	0
48	0
49	8
50	36
51	119
52	140
53	78
54	16
55	1
56	0
57	0
58	0
59	0
60	46
61	144
62	270
63	244
64	105
65	18
66	1
67	0
68	0
69	0
70	0
71	32
72	164
73	416
74	550
75	392
76	136
77	20
78	1

n	a(n)
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	0
9	4
10	1
11	0
12	0
13	3
14	6
15	1
16	0
17	0
18	4
19	10
20	8
21	1
22	0
23	0
24	0
25	12
26	21
27	10
28	1
29	0
30	0
31	0
32	12
33	32
34	36
35	12
36	1
37	0
38	0
39	0
40	6
41	45
42	72
43	55
44	14
45	1
46	0
47	0
48	0
49	8
50	36
51	119
52	140
53	78
54	16
55	1
56	0
57	0
58	0
59	0
60	46
61	144
62	270
63	244
64	105
65	18
66	1
67	0
68	0
69	0
70	0
71	32
72	164
73	416
74	550
75	392
76	136
77	20
78	1

n	a(n)
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	0
9	4
10	1
11	0
12	0
13	3
14	6
15	1
16	0
17	0
18	4
19	10
20	8
21	1
22	0
23	0
24	0
25	12
26	21
27	10
28	1
29	0
30	0
31	0
32	12
33	32
34	36
35	12
36	1
37	0
38	0
39	0
40	6
41	45
42	72
43	55
44	14
45	1
46	0
47	0
48	0
49	8
50	36
51	119
52	140
53	78
54	16
55	1
56	0
57	0
58	0
59	0
60	46
61	144
62	270
63	244
64	105
65	18
66	1
67	0
68	0
69	0
70	0
71	32
72	164
73	416
74	550
75	392
76	136
77	20
78	1