A103407 - cp's OEIS frontend

A103407 Triangle of absolute values of the coefficients (in descending powers) of the characteristic polynomials of n X n matrices with 3's on the main diagonal and 1's elsewhere.

n	a(n)
0	1
1	1
2	3
3	1
4	6
5	8
6	1
7	9
8	24
9	20
10	1
11	12
12	48
13	80
14	48
15	1
16	15
17	80
18	200
19	240
20	112
21	1
22	18
23	120
24	400
25	720
26	672
27	256
28	1
29	21
30	168
31	700
32	1680
33	2352
34	1792
35	576
36	1
37	24
38	224
39	1120
40	3360
41	6272
42	7168
43	4608
44	1280
45	1
46	27
47	288
48	1680
49	6048
50	14112
51	21504
52	20736
53	11520
54	2816
55	1
56	30

[1, 1, 3, 1, 6, 8, 1, 9, 24, 20, 1, 12, 48, 80, 48, 1, 15, 80, 200, 240, 112, 1, 18, 120, 400, 720, 672, 256, 1, 21, 168, 700, 1680, 2352, 1792, 576, 1, 24, 224, 1120, 3360, 6272, 7168, 4608, 1280, 1, 27, 288, 1680, 6048, 14112, 21504, 20736, 11520, 2816, 1, 30]

cp's OEIS Frontend

A103407 Triangle of absolute values of the coefficients (in descending powers) of the characteristic polynomials of n X n matrices with 3's on the main diagonal and 1's elsewhere.

Table of values

List of values