A091399 - cp's OEIS frontend

A091399 a(n) = Product_{ p | n } (1 + Legendre(7,p) ).

n	a(n)
1	1
2	2
3	2
4	2
5	0
6	4
7	1
8	2
9	2
10	0
11	0
12	4
13	0
14	2
15	0
16	2
17	0
18	4
19	2
20	0
21	2
22	0
23	0
24	4
25	0
26	0
27	2
28	2
29	2
30	0
31	2
32	2
33	0
34	0
35	0
36	4
37	2
38	4
39	0
40	0
41	0
42	4
43	0
44	0
45	0
46	0
47	2
48	4
49	1
50	0
51	0
52	0
53	2
54	4
55	0
56	2
57	4
58	4
59	2
60	0
61	0
62	4
63	2
64	2
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	4
73	0
74	4
75	0
76	4
77	0
78	0
79	0
80	0
81	2
82	0
83	2
84	4
85	0
86	0
87	4
88	0
89	0
90	0
91	0
92	0
93	4
94	4
95	0
96	4
97	0
98	2
99	0
100	0
101	0
102	0
103	2
104	0
105	0

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

cp's OEIS Frontend

A091399 a(n) = Product_{ p | n } (1 + Legendre(7,p) ).

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	2
5	0
6	4
7	1
8	2
9	2
10	0
11	0
12	4
13	0
14	2
15	0
16	2
17	0
18	4
19	2
20	0
21	2
22	0
23	0
24	4
25	0
26	0
27	2
28	2
29	2
30	0
31	2
32	2
33	0
34	0
35	0
36	4
37	2
38	4
39	0
40	0
41	0
42	4
43	0
44	0
45	0
46	0
47	2
48	4
49	1
50	0
51	0
52	0
53	2
54	4
55	0
56	2
57	4
58	4
59	2
60	0
61	0
62	4
63	2
64	2
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	4
73	0
74	4
75	0
76	4
77	0
78	0
79	0
80	0
81	2
82	0
83	2
84	4
85	0
86	0
87	4
88	0
89	0
90	0
91	0
92	0
93	4
94	4
95	0
96	4
97	0
98	2
99	0
100	0
101	0
102	0
103	2
104	0
105	0

n	a(n)
1	1
2	2
3	2
4	2
5	0
6	4
7	1
8	2
9	2
10	0
11	0
12	4
13	0
14	2
15	0
16	2
17	0
18	4
19	2
20	0
21	2
22	0
23	0
24	4
25	0
26	0
27	2
28	2
29	2
30	0
31	2
32	2
33	0
34	0
35	0
36	4
37	2
38	4
39	0
40	0
41	0
42	4
43	0
44	0
45	0
46	0
47	2
48	4
49	1
50	0
51	0
52	0
53	2
54	4
55	0
56	2
57	4
58	4
59	2
60	0
61	0
62	4
63	2
64	2
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	4
73	0
74	4
75	0
76	4
77	0
78	0
79	0
80	0
81	2
82	0
83	2
84	4
85	0
86	0
87	4
88	0
89	0
90	0
91	0
92	0
93	4
94	4
95	0
96	4
97	0
98	2
99	0
100	0
101	0
102	0
103	2
104	0
105	0

n	a(n)
1	1
2	2
3	2
4	2
5	0
6	4
7	1
8	2
9	2
10	0
11	0
12	4
13	0
14	2
15	0
16	2
17	0
18	4
19	2
20	0
21	2
22	0
23	0
24	4
25	0
26	0
27	2
28	2
29	2
30	0
31	2
32	2
33	0
34	0
35	0
36	4
37	2
38	4
39	0
40	0
41	0
42	4
43	0
44	0
45	0
46	0
47	2
48	4
49	1
50	0
51	0
52	0
53	2
54	4
55	0
56	2
57	4
58	4
59	2
60	0
61	0
62	4
63	2
64	2
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	4
73	0
74	4
75	0
76	4
77	0
78	0
79	0
80	0
81	2
82	0
83	2
84	4
85	0
86	0
87	4
88	0
89	0
90	0
91	0
92	0
93	4
94	4
95	0
96	4
97	0
98	2
99	0
100	0
101	0
102	0
103	2
104	0
105	0