A323077 - cp's OEIS frontend

A323077 Number of iterations of map x -> (x - (largest divisor d < x)) needed to reach 1 or a prime, when starting at x = n.

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	2
9	2
10	1
11	0
12	2
13	0
14	1
15	2
16	3
17	0
18	3
19	0
20	2
21	2
22	1
23	0
24	3
25	3
26	1
27	4
28	2
29	0
30	3
31	0
32	4
33	2
34	1
35	3
36	4
37	0
38	1
39	2
40	3
41	0
42	3
43	0
44	2
45	4
46	1
47	0
48	4
49	4
50	4
51	2
52	2
53	0
54	5
55	3
56	3
57	2
58	1
59	0
60	4
61	0
62	1
63	4
64	5
65	3
66	3
67	0
68	2
69	2
70	4
71	0
72	5
73	0
74	1
75	5
76	2
77	4
78	3
79	0
80	4
81	6
82	1
83	0
84	4
85	3
86	1
87	2
88	3
89	0
90	5
91	4
92	2
93	2
94	1
95	3
96	5
97	0
98	5
99	4
100	5
101	0
102	3
103	0
104	3
105	5

[0, 0, 0, 1, 0, 1, 0, 2, 2, 1, 0, 2, 0, 1, 2, 3, 0, 3, 0, 2, 2, 1, 0, 3, 3, 1, 4, 2, 0, 3, 0, 4, 2, 1, 3, 4, 0, 1, 2, 3, 0, 3, 0, 2, 4, 1, 0, 4, 4, 4, 2, 2, 0, 5, 3, 3, 2, 1, 0, 4, 0, 1, 4, 5, 3, 3, 0, 2, 2, 4, 0, 5, 0, 1, 5, 2, 4, 3, 0, 4, 6, 1, 0, 4, 3, 1, 2, 3, 0, 5, 4, 2, 2, 1, 3, 5, 0, 5, 4, 5, 0, 3, 0, 3, 5]

cp's OEIS Frontend

A323077 Number of iterations of map x -> (x - (largest divisor d < x)) needed to reach 1 or a prime, when starting at x = n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	2
9	2
10	1
11	0
12	2
13	0
14	1
15	2
16	3
17	0
18	3
19	0
20	2
21	2
22	1
23	0
24	3
25	3
26	1
27	4
28	2
29	0
30	3
31	0
32	4
33	2
34	1
35	3
36	4
37	0
38	1
39	2
40	3
41	0
42	3
43	0
44	2
45	4
46	1
47	0
48	4
49	4
50	4
51	2
52	2
53	0
54	5
55	3
56	3
57	2
58	1
59	0
60	4
61	0
62	1
63	4
64	5
65	3
66	3
67	0
68	2
69	2
70	4
71	0
72	5
73	0
74	1
75	5
76	2
77	4
78	3
79	0
80	4
81	6
82	1
83	0
84	4
85	3
86	1
87	2
88	3
89	0
90	5
91	4
92	2
93	2
94	1
95	3
96	5
97	0
98	5
99	4
100	5
101	0
102	3
103	0
104	3
105	5

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	2
9	2
10	1
11	0
12	2
13	0
14	1
15	2
16	3
17	0
18	3
19	0
20	2
21	2
22	1
23	0
24	3
25	3
26	1
27	4
28	2
29	0
30	3
31	0
32	4
33	2
34	1
35	3
36	4
37	0
38	1
39	2
40	3
41	0
42	3
43	0
44	2
45	4
46	1
47	0
48	4
49	4
50	4
51	2
52	2
53	0
54	5
55	3
56	3
57	2
58	1
59	0
60	4
61	0
62	1
63	4
64	5
65	3
66	3
67	0
68	2
69	2
70	4
71	0
72	5
73	0
74	1
75	5
76	2
77	4
78	3
79	0
80	4
81	6
82	1
83	0
84	4
85	3
86	1
87	2
88	3
89	0
90	5
91	4
92	2
93	2
94	1
95	3
96	5
97	0
98	5
99	4
100	5
101	0
102	3
103	0
104	3
105	5

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	2
9	2
10	1
11	0
12	2
13	0
14	1
15	2
16	3
17	0
18	3
19	0
20	2
21	2
22	1
23	0
24	3
25	3
26	1
27	4
28	2
29	0
30	3
31	0
32	4
33	2
34	1
35	3
36	4
37	0
38	1
39	2
40	3
41	0
42	3
43	0
44	2
45	4
46	1
47	0
48	4
49	4
50	4
51	2
52	2
53	0
54	5
55	3
56	3
57	2
58	1
59	0
60	4
61	0
62	1
63	4
64	5
65	3
66	3
67	0
68	2
69	2
70	4
71	0
72	5
73	0
74	1
75	5
76	2
77	4
78	3
79	0
80	4
81	6
82	1
83	0
84	4
85	3
86	1
87	2
88	3
89	0
90	5
91	4
92	2
93	2
94	1
95	3
96	5
97	0
98	5
99	4
100	5
101	0
102	3
103	0
104	3
105	5