A368679 - cp's OEIS frontend

A368679 Sum of the squarefree values of (n-k) where the numbers k are the numbers less than n that do not divide n.

n	a(n)
1	0
2	0
3	1
4	1
5	6
6	3
7	11
8	11
9	18
10	19
11	24
12	18
13	45
14	38
15	48
16	58
17	87
18	72
19	104
20	79
21	109
22	112
23	144
24	123
25	189
26	176
27	189
28	154
29	215
30	200
31	244
32	244
33	253
34	288
35	308
36	275
37	407
38	388
39	418
40	379
41	521
42	426
43	562
44	507
45	575
46	624
47	647
48	605
49	698
50	740
51	706
52	675
53	791
54	740
55	844
56	802
57	861
58	870
59	956

[0, 0, 1, 1, 6, 3, 11, 11, 18, 19, 24, 18, 45, 38, 48, 58, 87, 72, 104, 79, 109, 112, 144, 123, 189, 176, 189, 154, 215, 200, 244, 244, 253, 288, 308, 275, 407, 388, 418, 379, 521, 426, 562, 507, 575, 624, 647, 605, 698, 740, 706, 675, 791, 740, 844, 802, 861, 870, 956]

cp's OEIS Frontend

A368679 Sum of the squarefree values of (n-k) where the numbers k are the numbers less than n that do not divide n.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	6
6	3
7	11
8	11
9	18
10	19
11	24
12	18
13	45
14	38
15	48
16	58
17	87
18	72
19	104
20	79
21	109
22	112
23	144
24	123
25	189
26	176
27	189
28	154
29	215
30	200
31	244
32	244
33	253
34	288
35	308
36	275
37	407
38	388
39	418
40	379
41	521
42	426
43	562
44	507
45	575
46	624
47	647
48	605
49	698
50	740
51	706
52	675
53	791
54	740
55	844
56	802
57	861
58	870
59	956

n	a(n)
1	0
2	0
3	1
4	1
5	6
6	3
7	11
8	11
9	18
10	19
11	24
12	18
13	45
14	38
15	48
16	58
17	87
18	72
19	104
20	79
21	109
22	112
23	144
24	123
25	189
26	176
27	189
28	154
29	215
30	200
31	244
32	244
33	253
34	288
35	308
36	275
37	407
38	388
39	418
40	379
41	521
42	426
43	562
44	507
45	575
46	624
47	647
48	605
49	698
50	740
51	706
52	675
53	791
54	740
55	844
56	802
57	861
58	870
59	956

n	a(n)
1	0
2	0
3	1
4	1
5	6
6	3
7	11
8	11
9	18
10	19
11	24
12	18
13	45
14	38
15	48
16	58
17	87
18	72
19	104
20	79
21	109
22	112
23	144
24	123
25	189
26	176
27	189
28	154
29	215
30	200
31	244
32	244
33	253
34	288
35	308
36	275
37	407
38	388
39	418
40	379
41	521
42	426
43	562
44	507
45	575
46	624
47	647
48	605
49	698
50	740
51	706
52	675
53	791
54	740
55	844
56	802
57	861
58	870
59	956