A165930 - cp's OEIS frontend

A165930 a(1) = 1, for n > 1: a(n) = tau(sum of the previous terms) where tau(k) = number of the divisors of k.

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

[1, 1, 2, 3, 2, 3, 6, 6, 8, 6, 4, 8, 6, 8, 7, 2, 2, 6, 5, 4, 12, 8, 8, 4, 4, 12, 8, 4, 12, 10, 6, 4, 8, 8, 12, 16, 4, 8, 8, 8, 4, 8, 8, 4, 4, 8, 8, 4, 4, 12, 8, 4, 16, 4, 12, 4, 8, 8, 4, 4, 16, 8, 12, 8, 8, 8, 18, 18, 12, 8, 8, 4, 8, 4, 8, 4, 4, 16, 4, 4, 16, 4, 8, 8, 8, 4, 8, 4, 24, 8, 4, 12, 8, 8, 4, 4, 16]

cp's OEIS Frontend

A165930 a(1) = 1, for n > 1: a(n) = tau(sum of the previous terms) where tau(k) = number of the divisors of k.

Table of values

List of values

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

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

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