A211032 - cp's OEIS frontend

A211032 Number of 2 X 2 matrices having all elements in {0,1,...,n} and determinant in the open interval (-n,n).

n	a(n)
1	10
2	45
3	134
4	289
5	560
6	903
7	1476
8	2091
9	3014
10	4059
11	5456
12	6823
13	8994
14	10905
15	13434
16	16275
17	19740
18	22871
19	27440
20	31327
21	36778
22	42147
23	48176
24	53755
25	62164
26	69241
27	77466
28	86047
29	96474
30	105249
31	118114
32	128261
33	141542
34	154371
35	168172

[10, 45, 134, 289, 560, 903, 1476, 2091, 3014, 4059, 5456, 6823, 8994, 10905, 13434, 16275, 19740, 22871, 27440, 31327, 36778, 42147, 48176, 53755, 62164, 69241, 77466, 86047, 96474, 105249, 118114, 128261, 141542, 154371, 168172]

cp's OEIS Frontend

A211032 Number of 2 X 2 matrices having all elements in {0,1,...,n} and determinant in the open interval (-n,n).

Table of values

List of values