A138467 - cp's OEIS frontend

A138467 a(1)=1, then for n>=2 a(n) = n - floor((1/3)*a(a(n-1))).

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

[1, 2, 3, 3, 4, 5, 6, 7, 7, 8, 9, 10, 11, 11, 12, 13, 14, 15, 15, 16, 17, 18, 18, 19, 20, 21, 22, 22, 23, 24, 25, 26, 26, 27, 28, 29, 30, 30, 31, 32, 33, 34, 34, 35, 36, 37, 37, 38, 39, 40, 41, 41, 42, 43, 44, 45, 45, 46, 47, 48, 49, 49, 50, 51, 52, 53, 53, 54, 55, 56, 56, 57, 58]

cp's OEIS Frontend

A138467 a(1)=1, then for n>=2 a(n) = n - floor((1/3)*a(a(n-1))).

Table of values

List of values

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

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

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