A097027 - cp's OEIS frontend

A097027 Function f(x) = phi(x) + floor(x/2) is iterated; a(n) is the length of transient if the iteration was initiated at n.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	0
9	0
10	0
11	1
12	1
13	2
14	3
15	0
16	0
17	4
18	1
19	3
20	2
21	0
22	0
23	0
24	3
25	1
26	2
27	2
28	3
29	2
30	0
31	1
32	0
33	0
34	1
35	3
36	0
37	2
38	3
39	17
40	1
41	2
42	1
43	16
44	2
45	0
46	0
47	18
48	2
49	19
50	1
51	2
52	2
53	17
54	1
55	15
56	3
57	1
58	2
59	15
60	1
61	19
62	20
63	15
64	0
65	4
66	18
67	14
68	19
69	17
70	16
71	21
72	2
73	20
74	21
75	30
76	22
77	29
78	16
79	27
80	3
81	24
82	25
83	14
84	19
85	22
86	23
87	14
88	20
89	23

[0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 2, 3, 0, 0, 4, 1, 3, 2, 0, 0, 0, 3, 1, 2, 2, 3, 2, 0, 1, 0, 0, 1, 3, 0, 2, 3, 17, 1, 2, 1, 16, 2, 0, 0, 18, 2, 19, 1, 2, 2, 17, 1, 15, 3, 1, 2, 15, 1, 19, 20, 15, 0, 4, 18, 14, 19, 17, 16, 21, 2, 20, 21, 30, 22, 29, 16, 27, 3, 24, 25, 14, 19, 22, 23, 14, 20, 23]

cp's OEIS Frontend

A097027 Function f(x) = phi(x) + floor(x/2) is iterated; a(n) is the length of transient if the iteration was initiated at n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	0
9	0
10	0
11	1
12	1
13	2
14	3
15	0
16	0
17	4
18	1
19	3
20	2
21	0
22	0
23	0
24	3
25	1
26	2
27	2
28	3
29	2
30	0
31	1
32	0
33	0
34	1
35	3
36	0
37	2
38	3
39	17
40	1
41	2
42	1
43	16
44	2
45	0
46	0
47	18
48	2
49	19
50	1
51	2
52	2
53	17
54	1
55	15
56	3
57	1
58	2
59	15
60	1
61	19
62	20
63	15
64	0
65	4
66	18
67	14
68	19
69	17
70	16
71	21
72	2
73	20
74	21
75	30
76	22
77	29
78	16
79	27
80	3
81	24
82	25
83	14
84	19
85	22
86	23
87	14
88	20
89	23

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	0
9	0
10	0
11	1
12	1
13	2
14	3
15	0
16	0
17	4
18	1
19	3
20	2
21	0
22	0
23	0
24	3
25	1
26	2
27	2
28	3
29	2
30	0
31	1
32	0
33	0
34	1
35	3
36	0
37	2
38	3
39	17
40	1
41	2
42	1
43	16
44	2
45	0
46	0
47	18
48	2
49	19
50	1
51	2
52	2
53	17
54	1
55	15
56	3
57	1
58	2
59	15
60	1
61	19
62	20
63	15
64	0
65	4
66	18
67	14
68	19
69	17
70	16
71	21
72	2
73	20
74	21
75	30
76	22
77	29
78	16
79	27
80	3
81	24
82	25
83	14
84	19
85	22
86	23
87	14
88	20
89	23

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	0
9	0
10	0
11	1
12	1
13	2
14	3
15	0
16	0
17	4
18	1
19	3
20	2
21	0
22	0
23	0
24	3
25	1
26	2
27	2
28	3
29	2
30	0
31	1
32	0
33	0
34	1
35	3
36	0
37	2
38	3
39	17
40	1
41	2
42	1
43	16
44	2
45	0
46	0
47	18
48	2
49	19
50	1
51	2
52	2
53	17
54	1
55	15
56	3
57	1
58	2
59	15
60	1
61	19
62	20
63	15
64	0
65	4
66	18
67	14
68	19
69	17
70	16
71	21
72	2
73	20
74	21
75	30
76	22
77	29
78	16
79	27
80	3
81	24
82	25
83	14
84	19
85	22
86	23
87	14
88	20
89	23