A210367 - cp's OEIS frontend

A210367 Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >= 2n.

n	a(n)
0	1
1	0
2	5
3	26
4	83
5	203
6	456
7	853
8	1497
9	2477
10	3860
11	5690
12	8305
13	11470
14	15684
15	20947
16	27328
17	35057
18	44569
19	55569
20	68849
21	84153
22	101912
23	122125
24	146014
25	172246
26	202378
27	236593
28	274399
29	316494
30	364473
31	416055
32	473938
33	537432
34	607225
35	683593
36	767218
37	857111
38	955830

[1, 0, 5, 26, 83, 203, 456, 853, 1497, 2477, 3860, 5690, 8305, 11470, 15684, 20947, 27328, 35057, 44569, 55569, 68849, 84153, 101912, 122125, 146014, 172246, 202378, 236593, 274399, 316494, 364473, 416055, 473938, 537432, 607225, 683593, 767218, 857111, 955830]

cp's OEIS Frontend

A210367 Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >= 2n.

Table of values

List of values