A361511 - cp's OEIS frontend

A361511 a(1) = 1. Thereafter if a(n-1) is a novel term, a(n) = d(a(n-1)); otherwise, if a(n-1) is the t-th non-novel term, a(n) = a(n-1) + d(a(t)), where d is the divisor function A000005.

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

[1, 1, 2, 2, 3, 2, 4, 3, 5, 2, 4, 6, 4, 7, 2, 4, 6, 8, 4, 7, 11, 2, 5, 7, 9, 3, 6, 10, 4, 8, 11, 13, 2, 4, 6, 8, 10, 13, 15, 4, 8, 12, 6, 9, 13, 15, 17, 2, 4, 7, 11, 15, 19, 2, 4, 8, 11, 15, 21, 4, 8, 11, 13, 17, 19, 21, 24, 8, 10, 12, 16, 5, 7, 9, 12, 16, 18, 6, 10, 14, 4, 7, 11, 13, 15, 17, 19, 23]

cp's OEIS Frontend

A361511 a(1) = 1. Thereafter if a(n-1) is a novel term, a(n) = d(a(n-1)); otherwise, if a(n-1) is the t-th non-novel term, a(n) = a(n-1) + d(a(t)), where d is the divisor function A000005.

Table of values

List of values

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

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

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