A116569 - cp's OEIS frontend

A116569 a(n) = (x^3 - x) / 6, where x is the genus of the modular curve X_0(p) for p = prime(n).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	1
11	1
12	1
13	4
14	4
15	10
16	10
17	20
18	10
19	20
20	35
21	20
22	35
23	56
24	56
25	56
26	84
27	84
28	120
29	84
30	120
31	165
32	220
33	220
34	220
35	286
36	286
37	286
38	364
39	455
40	455
41	560
42	455
43	680
44	560
45	680
46	680
47	816
48	969
49	1140
50	969

[0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 4, 4, 10, 10, 20, 10, 20, 35, 20, 35, 56, 56, 56, 84, 84, 120, 84, 120, 165, 220, 220, 220, 286, 286, 286, 364, 455, 455, 560, 455, 680, 560, 680, 680, 816, 969, 1140, 969]

cp's OEIS Frontend

A116569 a(n) = (x^3 - x) / 6, where x is the genus of the modular curve X_0(p) for p = prime(n).

Table of values

List of values