A159081 - cp's OEIS frontend

A159081 Let d be the largest element of A008578 which divides n, then a(n) is the position of d in A008578.

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

[1, 2, 3, 2, 4, 3, 5, 2, 3, 4, 6, 3, 7, 5, 4, 2, 8, 3, 9, 4, 5, 6, 10, 3, 4, 7, 3, 5, 11, 4, 12, 2, 6, 8, 5, 3, 13, 9, 7, 4, 14, 5, 15, 6, 4, 10, 16, 3, 5, 4, 8, 7, 17, 3, 6, 5, 9, 11, 18, 4, 19, 12, 5, 2, 7, 6, 20, 8, 10, 5, 21, 3, 22, 13, 4, 9, 6, 7, 23, 4, 3, 14, 24, 5, 8, 15, 11, 6, 25, 4, 7, 10, 12]

cp's OEIS Frontend

A159081 Let d be the largest element of A008578 which divides n, then a(n) is the position of d in A008578.

Table of values

List of values

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

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

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