A228565 - cp's OEIS frontend

A228565 Triangle read by rows: coefficients of descending powers of the polynomial V(n,x) = cos((2n+1)(arccos(x)/2))/cos(arccos(x)/2), n >= 0.

n	a(n)
0	1
1	2
2	-1
3	4
4	-2
5	-1
6	8
7	-4
8	-4
9	1
10	16
11	-8
12	-12
13	4
14	1
15	32
16	-16
17	-32
18	12
19	6
20	-1
21	64
22	-32
23	-80
24	32
25	24
26	-6
27	-1
28	128
29	-64
30	-192
31	80
32	80
33	-24
34	-8
35	1
36	256
37	-128
38	-448
39	192
40	240
41	-80
42	-40
43	8
44	1
45	512
46	-256
47	-1024
48	448
49	672
50	-240
51	-160
52	40
53	10
54	-1
55	1024
56	-512
57	-2304
58	1024
59	1792
60	-672
61	-560
62	160
63	60
64	-10
65	-1
66	2048
67	-1024
68	-5120
69	2304
70	4608
71	-1792
72	-1792
73	560
74	280
75	-60
76	-12
77	1
78	4096
79	-2048
80	-11264
81	5120
82	11520
83	-4608
84	-5376
85	1792
86	1120
87	-280
88	-84
89	12
90	1

[1, 2, -1, 4, -2, -1, 8, -4, -4, 1, 16, -8, -12, 4, 1, 32, -16, -32, 12, 6, -1, 64, -32, -80, 32, 24, -6, -1, 128, -64, -192, 80, 80, -24, -8, 1, 256, -128, -448, 192, 240, -80, -40, 8, 1, 512, -256, -1024, 448, 672, -240, -160, 40, 10, -1, 1024, -512, -2304, 1024, 1792, -672, -560, 160, 60, -10, -1, 2048, -1024, -5120, 2304, 4608, -1792, -1792, 560, 280, -60, -12, 1, 4096, -2048, -11264, 5120, 11520, -4608, -5376, 1792, 1120, -280, -84, 12, 1]

cp's OEIS Frontend

A228565 Triangle read by rows: coefficients of descending powers of the polynomial V(n,x) = cos((2n+1)(arccos(x)/2))/cos(arccos(x)/2), n >= 0.

Table of values

List of values