A055020 - cp's OEIS frontend

A055020 Number of iterations of sigma() required until 2n (or greater) is reached.

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

[2, 2, 2, 2, 1, 2, 2, 3, 2, 2, 1, 3, 2, 2, 2, 2, 1, 2, 1, 2, 2, 2, 1, 3, 2, 2, 1, 2, 1, 2, 2, 2, 2, 2, 1, 3, 2, 2, 1, 2, 1, 3, 2, 2, 2, 2, 1, 3, 2, 2, 2, 2, 1, 2, 1, 2, 2, 2, 1, 3, 2, 2, 2, 2, 1, 3, 2, 2, 1, 2, 1, 3, 2, 2, 2, 2, 1, 2, 1, 4, 2, 2, 1, 2, 2, 2, 1, 2, 1, 2, 2, 2, 2, 2, 1, 3, 2, 2, 1, 2, 1, 2, 1]

cp's OEIS Frontend

A055020 Number of iterations of sigma() required until 2n (or greater) is reached.

Table of values

List of values

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

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

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