A243822 - cp's OEIS frontend

A243822 Number of k < n such that rad(k) | n but k does not divide n, where rad = A007947.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	2
11	0
12	2
13	0
14	2
15	1
16	0
17	0
18	4
19	0
20	2
21	1
22	3
23	0
24	3
25	0
26	3
27	0
28	2
29	0
30	10
31	0
32	0
33	2
34	4
35	1
36	5
37	0
38	4
39	2
40	3
41	0
42	11
43	0
44	3
45	2
46	4
47	0
48	5
49	0
50	6
51	2
52	3
53	0
54	8
55	1
56	3
57	2
58	4
59	0
60	14
61	0
62	4
63	2
64	0
65	1
66	14
67	0
68	4
69	2
70	12
71	0
72	6
73	0
74	5
75	3
76	4
77	1
78	15
79	0
80	4
81	0
82	5
83	0
84	16
85	1
86	5
87	3
88	3
89	0
90	20
91	1
92	4
93	3
94	5
95	1
96	8
97	0
98	7
99	2
100	6

[0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 2, 0, 2, 1, 0, 0, 4, 0, 2, 1, 3, 0, 3, 0, 3, 0, 2, 0, 10, 0, 0, 2, 4, 1, 5, 0, 4, 2, 3, 0, 11, 0, 3, 2, 4, 0, 5, 0, 6, 2, 3, 0, 8, 1, 3, 2, 4, 0, 14, 0, 4, 2, 0, 1, 14, 0, 4, 2, 12, 0, 6, 0, 5, 3, 4, 1, 15, 0, 4, 0, 5, 0, 16, 1, 5, 3, 3, 0, 20, 1, 4, 3, 5, 1, 8, 0, 7, 2, 6]

cp's OEIS Frontend

A243822 Number of k < n such that rad(k) | n but k does not divide n, where rad = A007947.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	2
11	0
12	2
13	0
14	2
15	1
16	0
17	0
18	4
19	0
20	2
21	1
22	3
23	0
24	3
25	0
26	3
27	0
28	2
29	0
30	10
31	0
32	0
33	2
34	4
35	1
36	5
37	0
38	4
39	2
40	3
41	0
42	11
43	0
44	3
45	2
46	4
47	0
48	5
49	0
50	6
51	2
52	3
53	0
54	8
55	1
56	3
57	2
58	4
59	0
60	14
61	0
62	4
63	2
64	0
65	1
66	14
67	0
68	4
69	2
70	12
71	0
72	6
73	0
74	5
75	3
76	4
77	1
78	15
79	0
80	4
81	0
82	5
83	0
84	16
85	1
86	5
87	3
88	3
89	0
90	20
91	1
92	4
93	3
94	5
95	1
96	8
97	0
98	7
99	2
100	6

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	2
11	0
12	2
13	0
14	2
15	1
16	0
17	0
18	4
19	0
20	2
21	1
22	3
23	0
24	3
25	0
26	3
27	0
28	2
29	0
30	10
31	0
32	0
33	2
34	4
35	1
36	5
37	0
38	4
39	2
40	3
41	0
42	11
43	0
44	3
45	2
46	4
47	0
48	5
49	0
50	6
51	2
52	3
53	0
54	8
55	1
56	3
57	2
58	4
59	0
60	14
61	0
62	4
63	2
64	0
65	1
66	14
67	0
68	4
69	2
70	12
71	0
72	6
73	0
74	5
75	3
76	4
77	1
78	15
79	0
80	4
81	0
82	5
83	0
84	16
85	1
86	5
87	3
88	3
89	0
90	20
91	1
92	4
93	3
94	5
95	1
96	8
97	0
98	7
99	2
100	6

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	2
11	0
12	2
13	0
14	2
15	1
16	0
17	0
18	4
19	0
20	2
21	1
22	3
23	0
24	3
25	0
26	3
27	0
28	2
29	0
30	10
31	0
32	0
33	2
34	4
35	1
36	5
37	0
38	4
39	2
40	3
41	0
42	11
43	0
44	3
45	2
46	4
47	0
48	5
49	0
50	6
51	2
52	3
53	0
54	8
55	1
56	3
57	2
58	4
59	0
60	14
61	0
62	4
63	2
64	0
65	1
66	14
67	0
68	4
69	2
70	12
71	0
72	6
73	0
74	5
75	3
76	4
77	1
78	15
79	0
80	4
81	0
82	5
83	0
84	16
85	1
86	5
87	3
88	3
89	0
90	20
91	1
92	4
93	3
94	5
95	1
96	8
97	0
98	7
99	2
100	6