A001617 - cp's OEIS frontend

A001617 Genus of modular group Gamma_0(n). Or, genus of modular curve X_0(n).

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

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 2, 2, 1, 0, 2, 1, 2, 2, 3, 2, 1, 3, 3, 3, 1, 2, 4, 3, 3, 3, 5, 3, 4, 3, 5, 4, 3, 1, 2, 5, 5, 4, 4, 5, 5, 5, 6, 5, 7, 4, 7, 5, 3, 5, 9, 5, 7, 7, 9, 6, 5, 5, 8, 5, 8, 7, 11, 6, 7, 4, 9, 7, 11, 7, 10, 9, 9, 7, 11, 7, 10, 9, 11, 9, 9, 7, 7, 9, 7, 8, 15]

cp's OEIS Frontend

A001617 Genus of modular group Gamma_0(n). Or, genus of modular curve X_0(n).

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

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

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