A083919 - cp's OEIS frontend

A083919 Number of divisors of n that are congruent to 9 modulo 10.

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

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

cp's OEIS Frontend

A083919 Number of divisors of n that are congruent to 9 modulo 10.

Table of values

List of values

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

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

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