A227819 - cp's OEIS frontend

A227819 Number T(n,k) of n-node rooted identity trees of height k; triangle T(n,k), n>=1, 0<=k<=n-1, read by rows.

n	a(n)
1	1
2	0
3	1
4	0
5	0
6	1
7	0
8	0
9	1
10	1
11	0
12	0
13	0
14	2
15	1
16	0
17	0
18	0
19	2
20	3
21	1
22	0
23	0
24	0
25	2
26	5
27	4
28	1
29	0
30	0
31	0
32	2
33	8
34	9
35	5
36	1
37	0
38	0
39	0
40	1
41	12
42	18
43	14
44	6
45	1
46	0
47	0
48	0
49	1
50	17
51	34
52	33
53	20
54	7
55	1
56	0
57	0
58	0
59	1
60	23
61	61
62	72
63	54
64	27
65	8
66	1
67	0
68	0
69	0
70	0
71	32
72	108
73	149
74	132
75	82
76	35
77	9
78	1
79	0
80	0
81	0
82	0
83	41
84	187
85	301
86	303
87	221
88	118
89	44
90	10
91	1

[1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 2, 1, 0, 0, 0, 2, 3, 1, 0, 0, 0, 2, 5, 4, 1, 0, 0, 0, 2, 8, 9, 5, 1, 0, 0, 0, 1, 12, 18, 14, 6, 1, 0, 0, 0, 1, 17, 34, 33, 20, 7, 1, 0, 0, 0, 1, 23, 61, 72, 54, 27, 8, 1, 0, 0, 0, 0, 32, 108, 149, 132, 82, 35, 9, 1, 0, 0, 0, 0, 41, 187, 301, 303, 221, 118, 44, 10, 1]

cp's OEIS Frontend

A227819 Number T(n,k) of n-node rooted identity trees of height k; triangle T(n,k), n>=1, 0<=k<=n-1, read by rows.

Table of values

List of values

n	a(n)
1	1
2	0
3	1
4	0
5	0
6	1
7	0
8	0
9	1
10	1
11	0
12	0
13	0
14	2
15	1
16	0
17	0
18	0
19	2
20	3
21	1
22	0
23	0
24	0
25	2
26	5
27	4
28	1
29	0
30	0
31	0
32	2
33	8
34	9
35	5
36	1
37	0
38	0
39	0
40	1
41	12
42	18
43	14
44	6
45	1
46	0
47	0
48	0
49	1
50	17
51	34
52	33
53	20
54	7
55	1
56	0
57	0
58	0
59	1
60	23
61	61
62	72
63	54
64	27
65	8
66	1
67	0
68	0
69	0
70	0
71	32
72	108
73	149
74	132
75	82
76	35
77	9
78	1
79	0
80	0
81	0
82	0
83	41
84	187
85	301
86	303
87	221
88	118
89	44
90	10
91	1

n	a(n)
1	1
2	0
3	1
4	0
5	0
6	1
7	0
8	0
9	1
10	1
11	0
12	0
13	0
14	2
15	1
16	0
17	0
18	0
19	2
20	3
21	1
22	0
23	0
24	0
25	2
26	5
27	4
28	1
29	0
30	0
31	0
32	2
33	8
34	9
35	5
36	1
37	0
38	0
39	0
40	1
41	12
42	18
43	14
44	6
45	1
46	0
47	0
48	0
49	1
50	17
51	34
52	33
53	20
54	7
55	1
56	0
57	0
58	0
59	1
60	23
61	61
62	72
63	54
64	27
65	8
66	1
67	0
68	0
69	0
70	0
71	32
72	108
73	149
74	132
75	82
76	35
77	9
78	1
79	0
80	0
81	0
82	0
83	41
84	187
85	301
86	303
87	221
88	118
89	44
90	10
91	1

n	a(n)
1	1
2	0
3	1
4	0
5	0
6	1
7	0
8	0
9	1
10	1
11	0
12	0
13	0
14	2
15	1
16	0
17	0
18	0
19	2
20	3
21	1
22	0
23	0
24	0
25	2
26	5
27	4
28	1
29	0
30	0
31	0
32	2
33	8
34	9
35	5
36	1
37	0
38	0
39	0
40	1
41	12
42	18
43	14
44	6
45	1
46	0
47	0
48	0
49	1
50	17
51	34
52	33
53	20
54	7
55	1
56	0
57	0
58	0
59	1
60	23
61	61
62	72
63	54
64	27
65	8
66	1
67	0
68	0
69	0
70	0
71	32
72	108
73	149
74	132
75	82
76	35
77	9
78	1
79	0
80	0
81	0
82	0
83	41
84	187
85	301
86	303
87	221
88	118
89	44
90	10
91	1