A006954 - OEIS

A006954 as a simple table

n	a(n)
0	1
1	2
2	6
3	30
4	42
5	30
6	66
7	2730
8	6
9	510
10	798
11	330
12	138
13	2730
14	6
15	870
16	14322
17	510
18	6
19	1919190
20	6
21	13530
22	1806
23	690
24	282
25	46410
26	66
27	1590
28	798
29	870
30	354
31	56786730
32	6
33	510
34	64722
35	30
36	4686
37	140100870
38	6
39	30
40	3318
41	230010
42	498
43	3404310
44	6
45	61410
46	272118
47	1410
48	6
49	4501770

[1,2,6,30,42,30,66,2730,6,510,798,330,138,2730,6, 870,14322,510,6,1919190,6,13530,1806,690,282, 46410,66,1590,798,870,354,56786730,6,510,64722,30, 4686,140100870,6,30,3318,230010,498,3404310,6, 61410,272118,1410,6,4501770]