A211155 - cp's OEIS frontend

A211155 Number of 2 X 2 matrices having all terms in {-n,...,0,..,n} and odd determinant.

n	a(n)
0	0
1	40
2	168
3	1056
4	2080
5	6120
6	9576
7	20608
8	28800
9	52200
10	68200
11	110880
12	138528
13	208936
14	252840
15	360960
16	426496
17	583848
18	677160
19	896800
20	1024800
21	1321320
22	1491688
23	1881216
24	2102400
25	2602600
26	2883816
27	3513888
28	3865120
29	4645800
30	5077800
31	6031360
32	6555648
33	7705896
34	8334760
35	9707040

[0, 40, 168, 1056, 2080, 6120, 9576, 20608, 28800, 52200, 68200, 110880, 138528, 208936, 252840, 360960, 426496, 583848, 677160, 896800, 1024800, 1321320, 1491688, 1881216, 2102400, 2602600, 2883816, 3513888, 3865120, 4645800, 5077800, 6031360, 6555648, 7705896, 8334760, 9707040]

cp's OEIS Frontend

A211155 Number of 2 X 2 matrices having all terms in {-n,...,0,..,n} and odd determinant.

Table of values

List of values