A128863 - cp's OEIS frontend

A128863 a(0)=1. For n >= 1, a(n) = number of positive divisors of (n+a(n-1)).

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

[1, 2, 3, 4, 4, 3, 3, 4, 6, 4, 4, 4, 5, 6, 6, 4, 6, 2, 6, 3, 2, 2, 8, 2, 4, 2, 6, 4, 6, 4, 4, 4, 9, 8, 8, 2, 4, 2, 8, 2, 8, 3, 6, 3, 2, 2, 10, 4, 6, 4, 8, 2, 8, 2, 8, 6, 4, 2, 12, 2, 4, 4, 8, 2, 8, 2, 6, 2, 8, 4, 4, 6, 8, 5, 2, 4, 10, 4, 4, 2, 4, 4, 4, 4, 8, 4, 12, 6, 4, 4, 4, 4, 12, 8, 8, 2, 6, 2, 9, 12, 10, 4]

cp's OEIS Frontend

A128863 a(0)=1. For n >= 1, a(n) = number of positive divisors of (n+a(n-1)).

Table of values

List of values

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

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

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