A336836 - cp's OEIS frontend

A336836 Number of iterations of x -> A003961(x) needed before A003961(x) < 2x, when starting from x=n, or -1 if such a number is never reached.

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

[0, 0, 0, 2, 0, 3, 0, 4, 1, 2, 0, 4, 0, 1, 2, 4, 0, 5, 0, 4, 1, 0, 0, 6, 0, 0, 3, 4, 0, 4, 0, 6, 0, 0, 1, 6, 0, 0, 1, 4, 0, 4, 0, 4, 3, 0, 0, 6, 1, 2, 0, 4, 0, 5, 0, 4, 1, 0, 0, 6, 0, 0, 3, 6, 0, 4, 0, 4, 1, 4, 0, 9, 0, 0, 4, 4, 0, 4, 0, 6, 3, 0, 0, 6, 0, 0, 0, 6, 0, 5, 1, 4, 0, 0, 0, 9, 0, 3, 3, 4, 0, 3, 0, 4, 3]

cp's OEIS Frontend

A336836 Number of iterations of x -> A003961(x) needed before A003961(x) < 2x, when starting from x=n, or -1 if such a number is never reached.

Table of values

List of values

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

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

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