A075107 - cp's OEIS frontend

A075107 Number of steps to reach the first integer (= A075108(n)) starting with n/floor(log_2(n)) and iterating the map x -> x*ceiling(x), or -1 if no integer is ever reached.

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

[0, 0, 0, 2, 0, 1, 1, 0, 5, 2, 0, 3, 2, 0, 0, 3, 3, 2, 0, 2, 1, 3, 0, 2, 2, 2, 0, 1, 1, 1, 2, 5, 3, 0, 16, 2, 4, 6, 0, 4, 16, 9, 2, 0, 1, 1, 1, 1, 0, 4, 2, 4, 8, 0, 2, 5, 2, 8, 0, 9, 3, 4, 5, 2, 0, 1, 1, 1, 1, 1, 0, 5, 7, 3, 2, 4, 0, 9, 4, 1, 2, 3, 0, 4, 1, 2, 1]

cp's OEIS Frontend

A075107 Number of steps to reach the first integer (= A075108(n)) starting with n/floor(log_2(n)) and iterating the map x -> x*ceiling(x), or -1 if no integer is ever reached.

Table of values

List of values

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

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

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