A356989 - cp's OEIS frontend

A356989 a(n) = n - a^[3](n - a^[4](n-1)) with a(1) = 1, where a^[3](n) = a(a(a(n))) and a^[4](n) = a(a(a(a(n)))).

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

[1, 1, 2, 3, 4, 4, 5, 6, 6, 7, 8, 9, 9, 10, 11, 12, 13, 13, 13, 14, 15, 16, 17, 18, 19, 19, 19, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 28, 28, 28, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 41, 41, 41, 41, 41, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 60, 60, 60]

cp's OEIS Frontend

A356989 a(n) = n - a^[3](n - a^[4](n-1)) with a(1) = 1, where a^[3](n) = a(a(a(n))) and a^[4](n) = a(a(a(a(n)))).

Table of values

List of values

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

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

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