A357629 - cp's OEIS frontend

A357629 Half-alternating sum of the prime indices of n.

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

[0, 1, 2, 2, 3, 3, 4, 1, 4, 4, 5, 0, 6, 5, 5, 0, 7, 1, 8, -1, 6, 6, 9, -1, 6, 7, 2, -2, 10, 0, 11, 1, 7, 8, 7, -2, 12, 9, 8, -2, 13, -1, 14, -3, 1, 10, 15, 2, 8, 1, 9, -4, 16, -1, 8, -3, 10, 11, 17, -3, 18, 12, 0, 2, 9, -2, 19, -5, 11, 0, 20, 1, 21, 13, 2, -6]

cp's OEIS Frontend

A357629 Half-alternating sum of the prime indices of n.

Table of values

List of values

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

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

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