A112292 - cp's OEIS frontend

A112292 An invertible triangle of ratios of double factorials.

n	a(n)
0	1
1	1
2	1
3	3
4	3
5	1
6	15
7	15
8	5
9	1
10	105
11	105
12	35
13	7
14	1
15	945
16	945
17	315
18	63
19	9
20	1
21	10395
22	10395
23	3465
24	693
25	99
26	11
27	1
28	135135
29	135135
30	45045
31	9009
32	1287
33	143
34	13
35	1
36	2027025
37	2027025
38	675675
39	135135
40	19305
41	2145
42	195
43	15
44	1
45	34459425
46	34459425
47	11486475
48	2297295
49	328185
50	36465
51	3315
52	255
53	17
54	1

[1, 1, 1, 3, 3, 1, 15, 15, 5, 1, 105, 105, 35, 7, 1, 945, 945, 315, 63, 9, 1, 10395, 10395, 3465, 693, 99, 11, 1, 135135, 135135, 45045, 9009, 1287, 143, 13, 1, 2027025, 2027025, 675675, 135135, 19305, 2145, 195, 15, 1, 34459425, 34459425, 11486475, 2297295, 328185, 36465, 3315, 255, 17, 1]

cp's OEIS Frontend

A112292 An invertible triangle of ratios of double factorials.

Table of values

List of values