A244657 - cp's OEIS frontend

A244657 Number T(n,k) of n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) 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	1
6	1
7	0
8	1
9	1
10	1
11	0
12	1
13	3
14	1
15	1
16	0
17	1
18	4
19	3
20	1
21	1
22	0
23	1
24	9
25	6
26	3
27	1
28	1
29	0
30	1
31	13
32	13
33	6
34	3
35	1
36	1
37	0
38	1
39	26
40	25
41	15
42	6
43	3
44	1
45	1
46	0
47	1
48	42
49	55
50	29
51	15
52	6
53	3
54	1
55	1
56	0
57	1
58	81
59	107
60	68
61	31
62	15
63	6
64	3
65	1
66	1
67	0
68	1
69	138
70	224
71	140
72	72
73	31
74	15
75	6
76	3
77	1
78	1

[1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 3, 1, 1, 0, 1, 4, 3, 1, 1, 0, 1, 9, 6, 3, 1, 1, 0, 1, 13, 13, 6, 3, 1, 1, 0, 1, 26, 25, 15, 6, 3, 1, 1, 0, 1, 42, 55, 29, 15, 6, 3, 1, 1, 0, 1, 81, 107, 68, 31, 15, 6, 3, 1, 1, 0, 1, 138, 224, 140, 72, 31, 15, 6, 3, 1, 1]

cp's OEIS Frontend

A244657 Number T(n,k) of n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) 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	1
6	1
7	0
8	1
9	1
10	1
11	0
12	1
13	3
14	1
15	1
16	0
17	1
18	4
19	3
20	1
21	1
22	0
23	1
24	9
25	6
26	3
27	1
28	1
29	0
30	1
31	13
32	13
33	6
34	3
35	1
36	1
37	0
38	1
39	26
40	25
41	15
42	6
43	3
44	1
45	1
46	0
47	1
48	42
49	55
50	29
51	15
52	6
53	3
54	1
55	1
56	0
57	1
58	81
59	107
60	68
61	31
62	15
63	6
64	3
65	1
66	1
67	0
68	1
69	138
70	224
71	140
72	72
73	31
74	15
75	6
76	3
77	1
78	1

n	a(n)
1	1
2	0
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	1
11	0
12	1
13	3
14	1
15	1
16	0
17	1
18	4
19	3
20	1
21	1
22	0
23	1
24	9
25	6
26	3
27	1
28	1
29	0
30	1
31	13
32	13
33	6
34	3
35	1
36	1
37	0
38	1
39	26
40	25
41	15
42	6
43	3
44	1
45	1
46	0
47	1
48	42
49	55
50	29
51	15
52	6
53	3
54	1
55	1
56	0
57	1
58	81
59	107
60	68
61	31
62	15
63	6
64	3
65	1
66	1
67	0
68	1
69	138
70	224
71	140
72	72
73	31
74	15
75	6
76	3
77	1
78	1

n	a(n)
1	1
2	0
3	1
4	0
5	1
6	1
7	0
8	1
9	1
10	1
11	0
12	1
13	3
14	1
15	1
16	0
17	1
18	4
19	3
20	1
21	1
22	0
23	1
24	9
25	6
26	3
27	1
28	1
29	0
30	1
31	13
32	13
33	6
34	3
35	1
36	1
37	0
38	1
39	26
40	25
41	15
42	6
43	3
44	1
45	1
46	0
47	1
48	42
49	55
50	29
51	15
52	6
53	3
54	1
55	1
56	0
57	1
58	81
59	107
60	68
61	31
62	15
63	6
64	3
65	1
66	1
67	0
68	1
69	138
70	224
71	140
72	72
73	31
74	15
75	6
76	3
77	1
78	1