A065358 - cp's OEIS frontend

A065358 The Jacob's Ladder sequence: a(n) = Sum_{k=1..n} (-1)^pi(k), where pi = A000720.

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

[0, 1, 0, 1, 2, 1, 0, 1, 2, 3, 4, 3, 2, 3, 4, 5, 6, 5, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 3, 4, 3, 2, 1, 0, -1, -2, -1, 0, 1, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, -1, -2, -1, 0, 1, 2, 3, 4, 3, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 5, 6, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 3, 2, 1, 0, -1, -2, -1, 0, 1, 2, 3, 4, 5, 6, 5, 4]

cp's OEIS Frontend

A065358 The Jacob's Ladder sequence: a(n) = Sum_{k=1..n} (-1)^pi(k), where pi = A000720.

Table of values

List of values

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

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

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