A127407 - cp's OEIS frontend

A127407 Negative value of coefficient of x^(n-2) in the characteristic polynomial of a certain n X n integer circulant matrix.

n	a(n)
2	3
3	15
4	44
5	100
6	195
7	343
8	560
9	864
10	1275
11	1815
12	2508
13	3380
14	4459
15	5775
16	7360
17	9248
18	11475
19	14079
20	17100
21	20580
22	24563
23	29095
24	34224
25	40000
26	46475
27	53703
28	61740
29	70644
30	80475
31	91295
32	103168
33	116160
34	130339
35	145775
36	162540
37	180708
38	200355

[3, 15, 44, 100, 195, 343, 560, 864, 1275, 1815, 2508, 3380, 4459, 5775, 7360, 9248, 11475, 14079, 17100, 20580, 24563, 29095, 34224, 40000, 46475, 53703, 61740, 70644, 80475, 91295, 103168, 116160, 130339, 145775, 162540, 180708, 200355]

cp's OEIS Frontend

A127407 Negative value of coefficient of x^(n-2) in the characteristic polynomial of a certain n X n integer circulant matrix.

Table of values

List of values