A380362 - cp's OEIS frontend

A380362 Triangle read by rows: T(n,k) is the number of Halin graphs on n unlabeled nodes with circuit rank k, 3 <= k <= n-1.

n	a(n)
4	1
5	0
6	1
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	1
17	2
18	1
19	0
20	0
21	0
22	3
23	2
24	1
25	0
26	0
27	0
28	3
29	6
30	3
31	1
32	0
33	0
34	0
35	0
36	7
37	11
38	3
39	1
40	0
41	0
42	0
43	0
44	4
45	24
46	17
47	4
48	1
49	0
50	0
51	0
52	0
53	0
54	24
55	51
56	26
57	4
58	1
59	0
60	0
61	0
62	0
63	0
64	12
65	89
66	109
67	36
68	5
69	1
70	0
71	0
72	0
73	0
74	0
75	0
76	74
77	265
78	194
79	50
80	5
81	1
82	0
83	0
84	0
85	0
86	0
87	0
88	27
89	371
90	660
91	345
92	65
93	6
94	1

[1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 2, 1, 0, 0, 0, 3, 2, 1, 0, 0, 0, 3, 6, 3, 1, 0, 0, 0, 0, 7, 11, 3, 1, 0, 0, 0, 0, 4, 24, 17, 4, 1, 0, 0, 0, 0, 0, 24, 51, 26, 4, 1, 0, 0, 0, 0, 0, 12, 89, 109, 36, 5, 1, 0, 0, 0, 0, 0, 0, 74, 265, 194, 50, 5, 1, 0, 0, 0, 0, 0, 0, 27, 371, 660, 345, 65, 6, 1]

cp's OEIS Frontend

A380362 Triangle read by rows: T(n,k) is the number of Halin graphs on n unlabeled nodes with circuit rank k, 3 <= k <= n-1.

Table of values

List of values

n	a(n)
4	1
5	0
6	1
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	1
17	2
18	1
19	0
20	0
21	0
22	3
23	2
24	1
25	0
26	0
27	0
28	3
29	6
30	3
31	1
32	0
33	0
34	0
35	0
36	7
37	11
38	3
39	1
40	0
41	0
42	0
43	0
44	4
45	24
46	17
47	4
48	1
49	0
50	0
51	0
52	0
53	0
54	24
55	51
56	26
57	4
58	1
59	0
60	0
61	0
62	0
63	0
64	12
65	89
66	109
67	36
68	5
69	1
70	0
71	0
72	0
73	0
74	0
75	0
76	74
77	265
78	194
79	50
80	5
81	1
82	0
83	0
84	0
85	0
86	0
87	0
88	27
89	371
90	660
91	345
92	65
93	6
94	1

n	a(n)
4	1
5	0
6	1
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	1
17	2
18	1
19	0
20	0
21	0
22	3
23	2
24	1
25	0
26	0
27	0
28	3
29	6
30	3
31	1
32	0
33	0
34	0
35	0
36	7
37	11
38	3
39	1
40	0
41	0
42	0
43	0
44	4
45	24
46	17
47	4
48	1
49	0
50	0
51	0
52	0
53	0
54	24
55	51
56	26
57	4
58	1
59	0
60	0
61	0
62	0
63	0
64	12
65	89
66	109
67	36
68	5
69	1
70	0
71	0
72	0
73	0
74	0
75	0
76	74
77	265
78	194
79	50
80	5
81	1
82	0
83	0
84	0
85	0
86	0
87	0
88	27
89	371
90	660
91	345
92	65
93	6
94	1

n	a(n)
4	1
5	0
6	1
7	0
8	1
9	1
10	0
11	0
12	1
13	1
14	0
15	0
16	1
17	2
18	1
19	0
20	0
21	0
22	3
23	2
24	1
25	0
26	0
27	0
28	3
29	6
30	3
31	1
32	0
33	0
34	0
35	0
36	7
37	11
38	3
39	1
40	0
41	0
42	0
43	0
44	4
45	24
46	17
47	4
48	1
49	0
50	0
51	0
52	0
53	0
54	24
55	51
56	26
57	4
58	1
59	0
60	0
61	0
62	0
63	0
64	12
65	89
66	109
67	36
68	5
69	1
70	0
71	0
72	0
73	0
74	0
75	0
76	74
77	265
78	194
79	50
80	5
81	1
82	0
83	0
84	0
85	0
86	0
87	0
88	27
89	371
90	660
91	345
92	65
93	6
94	1