A249148 - cp's OEIS frontend

A249148 a(1) = 1, after which, if a(n-1) = 1, a(n) = 1 + the total number of 1's that have occurred in the sequence so far, otherwise a(n) = the total number of times the least prime dividing a(n-1) [i.e., A020639(a(n-1))] occurs as a divisor (counted with multiplicity for each term) in the previous terms from a(1) up to and including a(n-1).

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

[1, 2, 1, 3, 1, 4, 3, 2, 4, 6, 7, 1, 5, 1, 6, 8, 11, 1, 7, 2, 12, 14, 15, 6, 16, 20, 22, 23, 1, 8, 26, 27, 10, 28, 30, 31, 1, 9, 13, 2, 32, 37, 1, 10, 38, 39, 14, 40, 43, 1, 11, 3, 15, 16, 47, 1, 12, 49, 7, 8, 52, 54, 55, 9, 22, 56, 59, 1, 13, 5, 10, 60, 62, 63, 25, 14, 64, 70, 71, 1, 14, 72, 75, 28, 77, 15, 29, 1, 15, 30, 78, 79, 1, 16, 83]

cp's OEIS Frontend

Table of values

List of values

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

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

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