A286783 - OEIS

A286783 as a simple table

n	a(n)
0	1
1	3
2	15
3	5
4	105
5	77
6	7
7	945
8	1044
9	234
10	9
11	10395
12	14784
13	5390
14	550
15	11
16	135135
17	227877
18	113126
19	19760
20	1105
21	13
22	2027025
23	3862305
24	2371845
25	586425
26	58275
27	1995
28	15
29	34459425
30	71983440
31	51607716
32	16271380
33	2356234
34	147560
35	3332
36	17
37	654729075
38	1469813400
39	1185214452
40	446964322
41	84487110
42	7888876
43	333564
44	5244
45	19
46	13749310575
47	32718512925
48	28937407212
49	12516198870
50	2884205268
51	358182846
52	23006928
53	690480
54	7875
55	21

[1,3,15,5,105,77,7,945,1044,234,9,10395,14784, 5390,550,11,135135,227877,113126,19760,1105,13, 2027025,3862305,2371845,586425,58275,1995,15, 34459425,71983440,51607716,16271380,2356234, 147560,3332,17,654729075,1469813400,1185214452, 446964322,84487110,7888876,333564,5244,19, 13749310575,32718512925,28937407212,12516198870, 2884205268,358182846,23006928,690480,7875,21]