A115076 - cp's OEIS frontend

A115076 Number of 2 X 2 symmetric matrices over Z(n) having determinant 1.

n	a(n)
1	1
2	4
3	6
4	12
5	30
6	24
7	42
8	48
9	54
10	120
11	110
12	72
13	182
14	168
15	180
16	192
17	306
18	216
19	342
20	360
21	252
22	440
23	506
24	288
25	750
26	728
27	486
28	504
29	870
30	720
31	930
32	768
33	660
34	1224
35	1260
36	648
37	1406
38	1368
39	1092
40	1440
41	1722
42	1008
43	1806
44	1320
45	1620
46	2024
47	2162
48	1152
49	2058
50	3000

[1, 4, 6, 12, 30, 24, 42, 48, 54, 120, 110, 72, 182, 168, 180, 192, 306, 216, 342, 360, 252, 440, 506, 288, 750, 728, 486, 504, 870, 720, 930, 768, 660, 1224, 1260, 648, 1406, 1368, 1092, 1440, 1722, 1008, 1806, 1320, 1620, 2024, 2162, 1152, 2058, 3000]

cp's OEIS Frontend

A115076 Number of 2 X 2 symmetric matrices over Z(n) having determinant 1.

Table of values

List of values