A196227 - cp's OEIS frontend

A196227 Number of 2 X 2 integer matrices with elements from {1,...,n} whose determinant is 1.

n	a(n)
0	0
1	0
2	2
3	8
4	14
5	28
6	34
7	56
8	70
9	92
10	106
11	144
12	158
13	204
14	226
15	256
16	286
17	348
18	370
19	440
20	470
21	516
22	554
23	640
24	670
25	748
26	794
27	864
28	910
29	1020
30	1050
31	1168
32	1230
33	1308
34	1370
35	1464
36	1510
37	1652
38	1722
39	1816
40	1878
41	2036
42	2082
43	2248
44	2326
45	2420
46	2506
47	2688
48	2750
49	2916
50	2994

[0, 0, 2, 8, 14, 28, 34, 56, 70, 92, 106, 144, 158, 204, 226, 256, 286, 348, 370, 440, 470, 516, 554, 640, 670, 748, 794, 864, 910, 1020, 1050, 1168, 1230, 1308, 1370, 1464, 1510, 1652, 1722, 1816, 1878, 2036, 2082, 2248, 2326, 2420, 2506, 2688, 2750, 2916, 2994]

cp's OEIS Frontend

A196227 Number of 2 X 2 integer matrices with elements from {1,...,n} whose determinant is 1.

Table of values

List of values