A075423 - cp's OEIS frontend

A075423 rad(n) - 1, where rad(n) is the squarefree kernel of n (A007947).

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	5
7	6
8	1
9	2
10	9
11	10
12	5
13	12
14	13
15	14
16	1
17	16
18	5
19	18
20	9
21	20
22	21
23	22
24	5
25	4
26	25
27	2
28	13
29	28
30	29
31	30
32	1
33	32
34	33
35	34
36	5
37	36
38	37
39	38
40	9
41	40
42	41
43	42
44	21
45	14
46	45
47	46
48	5
49	6
50	9
51	50
52	25
53	52
54	5
55	54
56	13
57	56
58	57
59	58
60	29
61	60
62	61
63	20
64	1
65	64
66	65
67	66
68	33
69	68
70	69
71	70
72	5
73	72
74	73
75	14
76	37
77	76
78	77

[0, 1, 2, 1, 4, 5, 6, 1, 2, 9, 10, 5, 12, 13, 14, 1, 16, 5, 18, 9, 20, 21, 22, 5, 4, 25, 2, 13, 28, 29, 30, 1, 32, 33, 34, 5, 36, 37, 38, 9, 40, 41, 42, 21, 14, 45, 46, 5, 6, 9, 50, 25, 52, 5, 54, 13, 56, 57, 58, 29, 60, 61, 20, 1, 64, 65, 66, 33, 68, 69, 70, 5, 72, 73, 14, 37, 76, 77]

cp's OEIS Frontend

A075423 rad(n) - 1, where rad(n) is the squarefree kernel of n (A007947).

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	5
7	6
8	1
9	2
10	9
11	10
12	5
13	12
14	13
15	14
16	1
17	16
18	5
19	18
20	9
21	20
22	21
23	22
24	5
25	4
26	25
27	2
28	13
29	28
30	29
31	30
32	1
33	32
34	33
35	34
36	5
37	36
38	37
39	38
40	9
41	40
42	41
43	42
44	21
45	14
46	45
47	46
48	5
49	6
50	9
51	50
52	25
53	52
54	5
55	54
56	13
57	56
58	57
59	58
60	29
61	60
62	61
63	20
64	1
65	64
66	65
67	66
68	33
69	68
70	69
71	70
72	5
73	72
74	73
75	14
76	37
77	76
78	77

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	5
7	6
8	1
9	2
10	9
11	10
12	5
13	12
14	13
15	14
16	1
17	16
18	5
19	18
20	9
21	20
22	21
23	22
24	5
25	4
26	25
27	2
28	13
29	28
30	29
31	30
32	1
33	32
34	33
35	34
36	5
37	36
38	37
39	38
40	9
41	40
42	41
43	42
44	21
45	14
46	45
47	46
48	5
49	6
50	9
51	50
52	25
53	52
54	5
55	54
56	13
57	56
58	57
59	58
60	29
61	60
62	61
63	20
64	1
65	64
66	65
67	66
68	33
69	68
70	69
71	70
72	5
73	72
74	73
75	14
76	37
77	76
78	77

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	5
7	6
8	1
9	2
10	9
11	10
12	5
13	12
14	13
15	14
16	1
17	16
18	5
19	18
20	9
21	20
22	21
23	22
24	5
25	4
26	25
27	2
28	13
29	28
30	29
31	30
32	1
33	32
34	33
35	34
36	5
37	36
38	37
39	38
40	9
41	40
42	41
43	42
44	21
45	14
46	45
47	46
48	5
49	6
50	9
51	50
52	25
53	52
54	5
55	54
56	13
57	56
58	57
59	58
60	29
61	60
62	61
63	20
64	1
65	64
66	65
67	66
68	33
69	68
70	69
71	70
72	5
73	72
74	73
75	14
76	37
77	76
78	77