A210369 - cp's OEIS frontend

A210369 Number of 2 X 2 matrices with all terms in {0,1,...,n} and even determinant.

n	a(n)
0	1
1	10
2	65
3	160
4	457
5	810
6	1681
7	2560
8	4481
9	6250
10	9841
11	12960
12	18985
13	24010
14	33377
15	40960
16	54721
17	65610
18	84961
19	100000
20	126281
21	146410
22	181105
23	207360
24	252097
25	285610
26	342161
27	384160
28	454441
29	506250
30	592321
31	655360
32	759425
33	835210
34	959617
35	1049760

[1, 10, 65, 160, 457, 810, 1681, 2560, 4481, 6250, 9841, 12960, 18985, 24010, 33377, 40960, 54721, 65610, 84961, 100000, 126281, 146410, 181105, 207360, 252097, 285610, 342161, 384160, 454441, 506250, 592321, 655360, 759425, 835210, 959617, 1049760]

cp's OEIS Frontend

A210369 Number of 2 X 2 matrices with all terms in {0,1,...,n} and even determinant.

Table of values

List of values