A209993 - cp's OEIS frontend

A209993 Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant in {-1,0,1}.

n	a(n)
0	1
1	16
2	45
3	94
4	159
5	248
6	349
7	478
8	623
9	792
10	973
11	1182
12	1423
13	1672
14	1933
15	2238
16	2559
17	2888
18	3261
19	3630
20	4063
21	4504
22	4925
23	5374
24	5935
25	6456
26	6957
27	7534
28	8159
29	8728
30	9453
31	10062
32	10767
33	11480
34	12141
35	12942
36	13855
37	14584
38	15325
39	16174
40	17183

[1, 16, 45, 94, 159, 248, 349, 478, 623, 792, 973, 1182, 1423, 1672, 1933, 2238, 2559, 2888, 3261, 3630, 4063, 4504, 4925, 5374, 5935, 6456, 6957, 7534, 8159, 8728, 9453, 10062, 10767, 11480, 12141, 12942, 13855, 14584, 15325, 16174, 17183]

cp's OEIS Frontend

A209993 Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant in {-1,0,1}.

Table of values

List of values