A095808 - cp's OEIS frontend

A095808 Number of ways to write n in the form m + (m+1) + ... + (m+k-1) + (m+k) + (m+k-1) + ... + (m+1) + m with integers m>= 1, k>=1. Or, number of divisors d of 4n-1 with 0 < (d-1)^2 < 4n.

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

[0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 2, 0, 0, 2, 0, 0, 1, 1, 1, 2, 0, 0, 1, 1, 1, 1, 0, 0, 3, 0, 1, 2, 0, 1, 1, 0, 0, 2, 2, 0, 1, 1, 0, 3, 0, 1, 2, 0, 1, 1, 0, 0, 3, 1, 0, 2, 1, 0, 3, 1, 0, 1, 0, 2, 2, 0, 1, 1, 1, 1, 1, 0, 0, 5, 1, 1, 1, 0, 1, 1, 1, 0, 3, 1, 0, 2, 0, 1, 3, 0, 0, 2, 1, 1, 3]

cp's OEIS Frontend

A095808 Number of ways to write n in the form m + (m+1) + ... + (m+k-1) + (m+k) + (m+k-1) + ... + (m+1) + m with integers m>= 1, k>=1. Or, number of divisors d of 4n-1 with 0 < (d-1)^2 < 4n.

Table of values

List of values

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

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

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