A353199 - cp's OEIS frontend

A353199 a(1)=a(2)=1. a(n) = the sum of the indices of the terms, from among the first (n-2) terms of the sequence, which divide a(n-1).

n	a(n)
1	1
2	1
3	1
4	3
5	6
6	10
7	6
8	15
9	10
10	12
11	22
12	6
13	22
14	17
15	6
16	34
17	20
18	21
19	10
20	21
21	28
22	6
23	49
24	6
25	71
26	6
27	95
28	6
29	121
30	6
31	149
32	6
33	179
34	6
35	211
36	6
37	245
38	29
39	6
40	281
41	6
42	320
43	57
44	10
45	40
46	101
47	6
48	361
49	6
50	408
51	497
52	31
53	6
54	457
55	6
56	510
57	681
58	10
59	84
60	634
61	6
62	565
63	6
64	626
65	6
66	689
67	6
68	754
69	44
70	30
71	965

[1, 1, 1, 3, 6, 10, 6, 15, 10, 12, 22, 6, 22, 17, 6, 34, 20, 21, 10, 21, 28, 6, 49, 6, 71, 6, 95, 6, 121, 6, 149, 6, 179, 6, 211, 6, 245, 29, 6, 281, 6, 320, 57, 10, 40, 101, 6, 361, 6, 408, 497, 31, 6, 457, 6, 510, 681, 10, 84, 634, 6, 565, 6, 626, 6, 689, 6, 754, 44, 30, 965]

cp's OEIS Frontend

A353199 a(1)=a(2)=1. a(n) = the sum of the indices of the terms, from among the first (n-2) terms of the sequence, which divide a(n-1).

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	3
5	6
6	10
7	6
8	15
9	10
10	12
11	22
12	6
13	22
14	17
15	6
16	34
17	20
18	21
19	10
20	21
21	28
22	6
23	49
24	6
25	71
26	6
27	95
28	6
29	121
30	6
31	149
32	6
33	179
34	6
35	211
36	6
37	245
38	29
39	6
40	281
41	6
42	320
43	57
44	10
45	40
46	101
47	6
48	361
49	6
50	408
51	497
52	31
53	6
54	457
55	6
56	510
57	681
58	10
59	84
60	634
61	6
62	565
63	6
64	626
65	6
66	689
67	6
68	754
69	44
70	30
71	965

n	a(n)
1	1
2	1
3	1
4	3
5	6
6	10
7	6
8	15
9	10
10	12
11	22
12	6
13	22
14	17
15	6
16	34
17	20
18	21
19	10
20	21
21	28
22	6
23	49
24	6
25	71
26	6
27	95
28	6
29	121
30	6
31	149
32	6
33	179
34	6
35	211
36	6
37	245
38	29
39	6
40	281
41	6
42	320
43	57
44	10
45	40
46	101
47	6
48	361
49	6
50	408
51	497
52	31
53	6
54	457
55	6
56	510
57	681
58	10
59	84
60	634
61	6
62	565
63	6
64	626
65	6
66	689
67	6
68	754
69	44
70	30
71	965

n	a(n)
1	1
2	1
3	1
4	3
5	6
6	10
7	6
8	15
9	10
10	12
11	22
12	6
13	22
14	17
15	6
16	34
17	20
18	21
19	10
20	21
21	28
22	6
23	49
24	6
25	71
26	6
27	95
28	6
29	121
30	6
31	149
32	6
33	179
34	6
35	211
36	6
37	245
38	29
39	6
40	281
41	6
42	320
43	57
44	10
45	40
46	101
47	6
48	361
49	6
50	408
51	497
52	31
53	6
54	457
55	6
56	510
57	681
58	10
59	84
60	634
61	6
62	565
63	6
64	626
65	6
66	689
67	6
68	754
69	44
70	30
71	965