A105821 - cp's OEIS frontend

A105821 Triangle of the numbers of different forests with one or more isolated vertices. Those forests have order N and m trees.

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	2
13	2
14	1
15	1
16	0
17	3
18	3
19	2
20	1
21	1
22	0
23	6
24	6
25	4
26	2
27	1
28	1
29	0
30	11
31	11
32	7
33	4
34	2
35	1
36	1
37	0
38	23
39	23
40	14
41	8
42	4
43	2
44	1
45	1
46	0
47	47
48	46
49	29
50	15
51	8
52	4
53	2
54	1
55	1
56	0
57	106
58	99
59	60
60	32
61	16
62	8
63	4
64	2
65	1
66	1
67	0
68	235
69	216
70	128
71	66
72	33
73	16
74	8
75	4
76	2
77	1
78	1
79	0
80	551
81	488
82	284
83	143
84	69
85	34
86	16
87	8
88	4
89	2
90	1
91	1

[1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 2, 2, 1, 1, 0, 3, 3, 2, 1, 1, 0, 6, 6, 4, 2, 1, 1, 0, 11, 11, 7, 4, 2, 1, 1, 0, 23, 23, 14, 8, 4, 2, 1, 1, 0, 47, 46, 29, 15, 8, 4, 2, 1, 1, 0, 106, 99, 60, 32, 16, 8, 4, 2, 1, 1, 0, 235, 216, 128, 66, 33, 16, 8, 4, 2, 1, 1, 0, 551, 488, 284, 143, 69, 34, 16, 8, 4, 2, 1, 1]

cp's OEIS Frontend

A105821 Triangle of the numbers of different forests with one or more isolated vertices. Those forests have order N and m trees.

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	2
13	2
14	1
15	1
16	0
17	3
18	3
19	2
20	1
21	1
22	0
23	6
24	6
25	4
26	2
27	1
28	1
29	0
30	11
31	11
32	7
33	4
34	2
35	1
36	1
37	0
38	23
39	23
40	14
41	8
42	4
43	2
44	1
45	1
46	0
47	47
48	46
49	29
50	15
51	8
52	4
53	2
54	1
55	1
56	0
57	106
58	99
59	60
60	32
61	16
62	8
63	4
64	2
65	1
66	1
67	0
68	235
69	216
70	128
71	66
72	33
73	16
74	8
75	4
76	2
77	1
78	1
79	0
80	551
81	488
82	284
83	143
84	69
85	34
86	16
87	8
88	4
89	2
90	1
91	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	2
13	2
14	1
15	1
16	0
17	3
18	3
19	2
20	1
21	1
22	0
23	6
24	6
25	4
26	2
27	1
28	1
29	0
30	11
31	11
32	7
33	4
34	2
35	1
36	1
37	0
38	23
39	23
40	14
41	8
42	4
43	2
44	1
45	1
46	0
47	47
48	46
49	29
50	15
51	8
52	4
53	2
54	1
55	1
56	0
57	106
58	99
59	60
60	32
61	16
62	8
63	4
64	2
65	1
66	1
67	0
68	235
69	216
70	128
71	66
72	33
73	16
74	8
75	4
76	2
77	1
78	1
79	0
80	551
81	488
82	284
83	143
84	69
85	34
86	16
87	8
88	4
89	2
90	1
91	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	2
13	2
14	1
15	1
16	0
17	3
18	3
19	2
20	1
21	1
22	0
23	6
24	6
25	4
26	2
27	1
28	1
29	0
30	11
31	11
32	7
33	4
34	2
35	1
36	1
37	0
38	23
39	23
40	14
41	8
42	4
43	2
44	1
45	1
46	0
47	47
48	46
49	29
50	15
51	8
52	4
53	2
54	1
55	1
56	0
57	106
58	99
59	60
60	32
61	16
62	8
63	4
64	2
65	1
66	1
67	0
68	235
69	216
70	128
71	66
72	33
73	16
74	8
75	4
76	2
77	1
78	1
79	0
80	551
81	488
82	284
83	143
84	69
85	34
86	16
87	8
88	4
89	2
90	1
91	1