A144643 - OEIS

A144643 as a simple table

n	a(n)
0	1
1	0
2	1
3	1
4	1
5	1
6	0
7	0
8	1
9	3
10	7
11	15
12	25
13	35
14	35
15	0
16	0
17	0
18	1
19	6
20	25
21	90
22	280
23	770
24	1855
25	3675
26	5775
27	5775
28	0
29	0
30	0
31	0
32	1
33	10
34	65
35	350
36	1645
37	6930
38	26425
39	90475
40	275275
41	725725
42	1576575
43	2627625
44	2627625
45	0
46	0
47	0
48	0
49	0
50	1
51	15
52	140
53	1050
54	6825
55	39795
56	211750
57	1033725
58	4629625

[1,0,1,1,1,1,0,0,1,3,7,15,25,35,35,0,0,0,1,6,25, 90,280,770,1855,3675,5775,5775,0,0,0,0,1,10,65, 350,1645,6930,26425,90475,275275,725725,1576575, 2627625,2627625,0,0,0,0,0,1,15,140,1050,6825, 39795,211750,1033725,4629625]