A135670 - cp's OEIS frontend

A135670 Triangular sequence of the coefficients of the denominator of the rational recursive sequence for tan(n*x).

n	a(n)
0	1
1	1
2	-1
3	0
4	1
5	-1
6	0
7	3
8	1
9	0
10	-6
11	0
12	1
13	1
14	0
15	-10
16	0
17	5
18	-1
19	0
20	15
21	0
22	-15
23	0
24	1
25	-1
26	0
27	21
28	0
29	-35
30	0
31	7
32	1
33	0
34	-28
35	0
36	70
37	0
38	-28
39	0
40	1
41	1
42	0
43	-36
44	0
45	126
46	0
47	-84
48	0
49	9
50	-1
51	0
52	45
53	0
54	-210
55	0
56	210
57	0
58	-45
59	0
60	1
61	-1
62	0
63	55
64	0
65	-330
66	0
67	462
68	0
69	-165
70	0
71	11

[1, 1, -1, 0, 1, -1, 0, 3, 1, 0, -6, 0, 1, 1, 0, -10, 0, 5, -1, 0, 15, 0, -15, 0, 1, -1, 0, 21, 0, -35, 0, 7, 1, 0, -28, 0, 70, 0, -28, 0, 1, 1, 0, -36, 0, 126, 0, -84, 0, 9, -1, 0, 45, 0, -210, 0, 210, 0, -45, 0, 1, -1, 0, 55, 0, -330, 0, 462, 0, -165, 0, 11]

cp's OEIS Frontend

A135670 Triangular sequence of the coefficients of the denominator of the rational recursive sequence for tan(n*x).

Table of values

List of values