A281194 - cp's OEIS frontend

A281194 Number of 2 X 2 matrices with all terms in {-n,..,0,..,n} and (sum of terms) = determinant.

n	a(n)
0	1
1	31
2	111
3	271
4	479
5	831
6	1167
7	1711
8	2239
9	2975
10	3631
11	4687
12	5407
13	6655
14	7759
15	9135
16	10367
17	12127
18	13231
19	15375
20	16991
21	19135
22	20879
23	23471
24	25215
25	27999
26	30319
27	33167
28	35359
29	39167
30	41039
31	44975
32	47615
33	50975
34	54511
35	58767
36	61791
37	66239
38	69391

[1, 31, 111, 271, 479, 831, 1167, 1711, 2239, 2975, 3631, 4687, 5407, 6655, 7759, 9135, 10367, 12127, 13231, 15375, 16991, 19135, 20879, 23471, 25215, 27999, 30319, 33167, 35359, 39167, 41039, 44975, 47615, 50975, 54511, 58767, 61791, 66239, 69391]

cp's OEIS Frontend

A281194 Number of 2 X 2 matrices with all terms in {-n,..,0,..,n} and (sum of terms) = determinant.

Table of values

List of values