A181107 - cp's OEIS frontend

A181107 Triangle read by rows: T(n,k) is the number of 2 X 2 matrices over Z(n) having determinant congruent to k mod n, 1 <= n, 0 <= k <= n-1.

n	a(n)
1	1
2	10
3	6
4	33
5	24
6	24
7	88
8	48
9	72
10	48
11	145
12	120
13	120
14	120
15	120
16	330
17	144
18	240
19	198
20	240
21	144
22	385
23	336
24	336
25	336
26	336
27	336
28	336
29	736
30	384
31	576
32	384
33	672
34	384
35	576
36	384
37	945
38	648
39	648
40	864
41	648
42	648
43	864
44	648
45	648
46	1450
47	720
48	1200
49	720
50	1200
51	870
52	1200
53	720
54	1200
55	720

[1, 10, 6, 33, 24, 24, 88, 48, 72, 48, 145, 120, 120, 120, 120, 330, 144, 240, 198, 240, 144, 385, 336, 336, 336, 336, 336, 336, 736, 384, 576, 384, 672, 384, 576, 384, 945, 648, 648, 864, 648, 648, 864, 648, 648, 1450, 720, 1200, 720, 1200, 870, 1200, 720, 1200, 720]

cp's OEIS Frontend

A181107 Triangle read by rows: T(n,k) is the number of 2 X 2 matrices over Z(n) having determinant congruent to k mod n, 1 <= n, 0 <= k <= n-1.

Table of values

List of values