A103406 - cp's OEIS frontend

A103406 Triangle read by rows: n-th row = unsigned coefficients of the characteristic polynomials of an n X n matrix with 2's on the diagonal and 1's elsewhere.

n	a(n)
0	1
1	1
2	2
3	1
4	4
5	3
6	1
7	6
8	9
9	4
10	1
11	8
12	18
13	16
14	5
15	1
16	10
17	30
18	40
19	25
20	6
21	1
22	12
23	45
24	80
25	75
26	36
27	7
28	1
29	14
30	63
31	140
32	175
33	126
34	49
35	8
36	1
37	16
38	84
39	224
40	350
41	336
42	196
43	64
44	9
45	1
46	18
47	108
48	336
49	630
50	756
51	588
52	288
53	81
54	10
55	1
56	20
57	135
58	480
59	1050
60	1512
61	1470
62	960
63	405
64	100
65	11
66	1
67	22
68	165

[1, 1, 2, 1, 4, 3, 1, 6, 9, 4, 1, 8, 18, 16, 5, 1, 10, 30, 40, 25, 6, 1, 12, 45, 80, 75, 36, 7, 1, 14, 63, 140, 175, 126, 49, 8, 1, 16, 84, 224, 350, 336, 196, 64, 9, 1, 18, 108, 336, 630, 756, 588, 288, 81, 10, 1, 20, 135, 480, 1050, 1512, 1470, 960, 405, 100, 11, 1, 22, 165]

cp's OEIS Frontend

A103406 Triangle read by rows: n-th row = unsigned coefficients of the characteristic polynomials of an n X n matrix with 2's on the diagonal and 1's elsewhere.

Table of values

List of values