A279905 - cp's OEIS frontend

A279905 Number of 2 X 2 matrices with entries in {0,1,...,n} and odd trace with no elements repeated.

n	a(n)
0	0
1	0
2	0
3	16
4	72
5	216
6	480
7	960
8	1680
9	2800
10	4320
11	6480
12	9240
13	12936
14	17472
15	23296
16	30240
17	38880
18	48960
19	61200
20	75240
21	91960
22	110880
23	133056
24	157872
25	186576
26	218400
27	254800
28	294840
29	340200
30	389760
31	445440
32	505920
33	573376
34	646272
35	727056
36	813960
37	909720

[0, 0, 0, 16, 72, 216, 480, 960, 1680, 2800, 4320, 6480, 9240, 12936, 17472, 23296, 30240, 38880, 48960, 61200, 75240, 91960, 110880, 133056, 157872, 186576, 218400, 254800, 294840, 340200, 389760, 445440, 505920, 573376, 646272, 727056, 813960, 909720]

cp's OEIS Frontend

A279905 Number of 2 X 2 matrices with entries in {0,1,...,n} and odd trace with no elements repeated.

Table of values

List of values