A065081 - cp's OEIS frontend

A065081 Alternating bit sum (A065359) for n-th prime p: replace 2^k with (-1)^k in binary expansion of p.

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

[-1, 0, 2, 1, -1, 1, 2, 1, 2, 2, 1, 1, -1, -2, -1, 2, -1, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, -1, 1, 2, 1, -1, -1, -2, 2, 1, 1, -2, -1, -1, -1, 1, -1, 1, 2, 1, 1, 1, -1, 1, -1, -1, 1, -1, 2, 2, 2, 1, 4, 2, 1, 2, 1, 2, 1, 2, 1, 4, 2, 4, 2, 2, 1, 4, 1, 2, 2, 1, 2, 1, -1, 1, -1, 1, 1, -1, 2, 1, 2, 1, 2, 2, 1, -1, 1, 2, 2, -1, -2, 1]

cp's OEIS Frontend

A065081 Alternating bit sum (A065359) for n-th prime p: replace 2^k with (-1)^k in binary expansion of p.

Table of values

List of values

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

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

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