A166317 - cp's OEIS frontend

A166317 Exponential Riordan array [sec(2x), arctanh(tan(x))].

n	a(n)
0	1
1	0
2	1
3	4
4	0
5	1
6	0
7	16
8	0
9	1
10	80
11	0
12	40
13	0
14	1
15	0
16	640
17	0
18	80
19	0
20	1
21	3904
22	0
23	2800
24	0
25	140
26	0
27	1
28	0
29	49152
30	0
31	8960
32	0
33	224
34	0
35	1
36	354560
37	0
38	319744
39	0
40	23520
41	0
42	336
43	0
44	1
45	0
46	6225920
47	0
48	1454080
49	0
50	53760
51	0
52	480
53	0
54	1
55	51733504
56	0
57	54897920
58	0
59	5230720
60	0
61	110880
62	0
63	660
64	0
65	1

[1, 0, 1, 4, 0, 1, 0, 16, 0, 1, 80, 0, 40, 0, 1, 0, 640, 0, 80, 0, 1, 3904, 0, 2800, 0, 140, 0, 1, 0, 49152, 0, 8960, 0, 224, 0, 1, 354560, 0, 319744, 0, 23520, 0, 336, 0, 1, 0, 6225920, 0, 1454080, 0, 53760, 0, 480, 0, 1, 51733504, 0, 54897920, 0, 5230720, 0, 110880, 0, 660, 0, 1]

cp's OEIS Frontend

A166317 Exponential Riordan array [sec(2x), arctanh(tan(x))].

Table of values

List of values