A266113 - cp's OEIS frontend

A266113 a(n) = number of integers k <= n which are least siblings in A263267-tree (see A266114).

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

[1, 1, 2, 2, 3, 4, 5, 6, 7, 7, 8, 8, 9, 10, 10, 10, 11, 12, 13, 14, 14, 15, 16, 17, 18, 18, 19, 19, 20, 20, 21, 22, 22, 23, 24, 24, 25, 26, 26, 27, 28, 28, 29, 30, 30, 31, 32, 32, 33, 34, 35, 35, 36, 36, 36, 37, 38, 39, 40, 40, 41, 42, 42, 42, 43, 43, 44, 45, 45, 45, 46, 47, 48, 49, 49, 49, 50, 50, 51, 51, 52, 53, 54, 55, 55]

cp's OEIS Frontend

A266113 a(n) = number of integers k <= n which are least siblings in A263267-tree (see A266114).

Table of values

List of values

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

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

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