A382331 - cp's OEIS frontend

A382331 If n = Product (p_j^k_j) then a(n) = -Sum ((-1)^k_j * p_j).

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

[0, 2, 3, -2, 5, 5, 7, 2, -3, 7, 11, 1, 13, 9, 8, -2, 17, -1, 19, 3, 10, 13, 23, 5, -5, 15, 3, 5, 29, 10, 31, 2, 14, 19, 12, -5, 37, 21, 16, 7, 41, 12, 43, 9, 2, 25, 47, 1, -7, -3, 20, 11, 53, 5, 16, 9, 22, 31, 59, 6, 61, 33, 4, -2, 18, 16, 67, 15, 26, 14, 71, -1, 73, 39, -2]

cp's OEIS Frontend

A382331 If n = Product (p_j^k_j) then a(n) = -Sum ((-1)^k_j * p_j).

Table of values

List of values

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

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

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