A126570 - cp's OEIS frontend

A126570 Triangle read by rows: row n gives coefficients (ignoring the alternating signs) of the characteristic polynomial of the n X n matrix with 2's in the main diagonal, 1's in the super- and subdiagonals, and 1 in the upper-right corner, with other elements zeros.

n	a(n)
0	1
1	1
2	2
3	1
4	4
5	3
6	1
7	6
8	10
9	5
10	1
11	8
12	21
13	20
14	4
15	1
16	10
17	36
18	56
19	35
20	7
21	1
22	12
23	55
24	120
25	126
26	56
27	6
28	1
29	14
30	78
31	220
32	330
33	252
34	84
35	9
36	1
37	16
38	105
39	364
40	715
41	792
42	462
43	120
44	8
45	1
46	18
47	136
48	560
49	1365
50	2002
51	1716
52	792
53	165
54	11
55	1
56	20
57	171
58	816
59	2380
60	4368
61	5005
62	3432
63	1287
64	220
65	10

[1, 1, 2, 1, 4, 3, 1, 6, 10, 5, 1, 8, 21, 20, 4, 1, 10, 36, 56, 35, 7, 1, 12, 55, 120, 126, 56, 6, 1, 14, 78, 220, 330, 252, 84, 9, 1, 16, 105, 364, 715, 792, 462, 120, 8, 1, 18, 136, 560, 1365, 2002, 1716, 792, 165, 11, 1, 20, 171, 816, 2380, 4368, 5005, 3432, 1287, 220, 10]

cp's OEIS Frontend

A126570 Triangle read by rows: row n gives coefficients (ignoring the alternating signs) of the characteristic polynomial of the n X n matrix with 2's in the main diagonal, 1's in the super- and subdiagonals, and 1 in the upper-right corner, with other elements zeros.

Table of values

List of values