A211142 - cp's OEIS frontend

A211142 Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and determinant n+1.

n	a(n)
0	0
1	4
2	24
3	116
4	128
5	408
6	296
7	788
8	748
9	1232
10	888
11	2488
12	1312
13	2568
14	2664
15	3860
16	2352
17	5652
18	3032
19	6864
20	5320
21	6456
22	4520
23	12152
24	6356
25	9264
26	9000
27	13288
28	7392
29	18440
30	8520
31	17556
32	13576
33	16032
34	14216
35	28612

[0, 4, 24, 116, 128, 408, 296, 788, 748, 1232, 888, 2488, 1312, 2568, 2664, 3860, 2352, 5652, 3032, 6864, 5320, 6456, 4520, 12152, 6356, 9264, 9000, 13288, 7392, 18440, 8520, 17556, 13576, 16032, 14216, 28612]

cp's OEIS Frontend

A211142 Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and determinant n+1.

Table of values

List of values