A211143 - cp's OEIS frontend

A211143 Number of 2 X 2 matrices having all terms in {-n, ..., 0, ..., n} and determinant = n^2.

n	a(n)
0	1
1	20
2	52
3	84
4	132
5	156
6	260
7	228
8	356
9	372
10	492
11	404
12	804
13	508
14	820
15	844
16	964
17	716
18	1396
19	852
20	1660
21	1380
22	1540
23	1092
24	2452
25	1476
26	1932
27	1876
28	2564
29	1532
30	3884
31	1700
32	3012
33	2676
34	3004
35	2876
36	4916
37	2172
38	3684
39	3484
40	5260

[1, 20, 52, 84, 132, 156, 260, 228, 356, 372, 492, 404, 804, 508, 820, 844, 964, 716, 1396, 852, 1660, 1380, 1540, 1092, 2452, 1476, 1932, 1876, 2564, 1532, 3884, 1700, 3012, 2676, 3004, 2876, 4916, 2172, 3684, 3484, 5260]

cp's OEIS Frontend

A211143 Number of 2 X 2 matrices having all terms in {-n, ..., 0, ..., n} and determinant = n^2.

Table of values

List of values