A204165 - cp's OEIS frontend

A204165 Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of floor[(i+j)/2], as in A204164.

n	a(n)
1	1
2	-1
3	1
4	-3
5	1
6	-1
7	-2
8	6
9	-1
10	0
11	4
12	4
13	-10
14	1
15	0
16	0
17	-15
18	-4
19	15
20	-1
21	0
22	0
23	0
24	36
25	3
26	-21
27	1
28	0
29	0
30	0
31	0
32	-84
33	4
34	28
35	-1
36	0
37	0
38	0
39	0
40	0
41	160
42	-16
43	-36
44	1
45	0
46	0
47	0
48	0
49	0
50	0
51	-300
52	40
53	45
54	-1
55	0
56	0
57	0
58	0
59	0
60	0
61	0
62	500
63	-75
64	-55
65	1
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	-825
75	130

[1, -1, 1, -3, 1, -1, -2, 6, -1, 0, 4, 4, -10, 1, 0, 0, -15, -4, 15, -1, 0, 0, 0, 36, 3, -21, 1, 0, 0, 0, 0, -84, 4, 28, -1, 0, 0, 0, 0, 0, 160, -16, -36, 1, 0, 0, 0, 0, 0, 0, -300, 40, 45, -1, 0, 0, 0, 0, 0, 0, 0, 500, -75, -55, 1, 0, 0, 0, 0, 0, 0, 0, 0, -825, 130]

cp's OEIS Frontend

A204165 Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of floor[(i+j)/2], as in A204164.

Table of values

List of values