A263649 - cp's OEIS frontend

A263649 a(n) is multiplicative with a(2^e) = (-1)^e, a(3^e) = -2(-1)^e if e>0, a(p^e) = e+1 if p == 1, 7 (mod 24), a(p^e) = (e+1) (-1)^e if p == 5, 11 (mod 24), a(p^e) = (1 + (-1)^e) / 2 if p == 13, 17, 19, 23 (mod 24).

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

[1, -1, 2, 1, -2, -2, 2, -1, -2, 2, -2, 2, 0, -2, -4, 1, 0, 2, 0, -2, 4, 2, 0, -2, 3, 0, 2, 2, -2, 4, 2, -1, -4, 0, -4, -2, 0, 0, 0, 2, 0, -4, 0, -2, 4, 0, 0, 2, 3, -3, 0, 0, -2, -2, 4, -2, 0, 2, -2, -4, 0, -2, -4, 1, 0, 4, 0, 0, 0, 4, 0, 2, 2, 0, 6, 0, -4, 0]

cp's OEIS Frontend

A263649 a(n) is multiplicative with a(2^e) = (-1)^e, a(3^e) = -2(-1)^e if e>0, a(p^e) = e+1 if p == 1, 7 (mod 24), a(p^e) = (e+1) (-1)^e if p == 5, 11 (mod 24), a(p^e) = (1 + (-1)^e) / 2 if p == 13, 17, 19, 23 (mod 24).

Table of values

List of values

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

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

cp's OEIS Frontend

A263649 a(n) is multiplicative with a(2^e) = (-1)^e, a(3^e) = -2*(-1)^e if e>0, a(p^e) = e+1 if p == 1, 7 (mod 24), a(p^e) = (e+1) * (-1)^e if p == 5, 11 (mod 24), a(p^e) = (1 + (-1)^e) / 2 if p == 13, 17, 19, 23 (mod 24).

Table of values

List of values

A263649 a(n) is multiplicative with a(2^e) = (-1)^e, a(3^e) = -2(-1)^e if e>0, a(p^e) = e+1 if p == 1, 7 (mod 24), a(p^e) = (e+1) (-1)^e if p == 5, 11 (mod 24), a(p^e) = (1 + (-1)^e) / 2 if p == 13, 17, 19, 23 (mod 24).

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