A278902 - cp's OEIS frontend

A278902 Number of 2 X 2 matrices with entries in {0,1,...,n} with determinant = trace and no entry repeated.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	8
6	12
7	24
8	28
9	40
10	48
11	68
12	72
13	100
14	120
15	132
16	144
17	188
18	208
19	252
20	280
21	304
22	336
23	396
24	416
25	464
26	512
27	556
28	592
29	668
30	704
31	776
32	844
33	900
34	960
35	1020
36	1056
37	1148
38	1240
39	1308
40	1348
41	1456
42	1524
43	1628
44	1728
45	1792
46	1872
47	2004
48	2080
49	2188
50	2292

[0, 0, 0, 0, 0, 8, 12, 24, 28, 40, 48, 68, 72, 100, 120, 132, 144, 188, 208, 252, 280, 304, 336, 396, 416, 464, 512, 556, 592, 668, 704, 776, 844, 900, 960, 1020, 1056, 1148, 1240, 1308, 1348, 1456, 1524, 1628, 1728, 1792, 1872, 2004, 2080, 2188, 2292]

cp's OEIS Frontend

A278902 Number of 2 X 2 matrices with entries in {0,1,...,n} with determinant = trace and no entry repeated.

Table of values

List of values