A126120 - OEIS

A126120 as a simple table

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	0
6	5
7	0
8	14
9	0
10	42
11	0
12	132
13	0
14	429
15	0
16	1430
17	0
18	4862
19	0
20	16796
21	0
22	58786
23	0
24	208012
25	0
26	742900
27	0
28	2674440
29	0
30	9694845
31	0
32	35357670
33	0
34	129644790
35	0
36	477638700
37	0
38	1767263190
39	0
40	6564120420
41	0
42	24466267020
43	0
44	91482563640
45	0
46	343059613650
47	0

[1,0,1,0,2,0,5,0,14,0,42,0,132,0,429,0,1430,0, 4862,0,16796,0,58786,0,208012,0,742900,0,2674440, 0,9694845,0,35357670,0,129644790,0,477638700,0, 1767263190,0,6564120420,0,24466267020,0, 91482563640,0,343059613650,0]