A390220 - OEIS

A390220 as a simple table

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	0
6	1
7	0
8	1
9	1
10	1
11	5
12	1
13	15
14	1
15	35
16	1
17	70
18	2
19	126
20	10
21	210
22	46
23	330
24	166
25	495
26	496
27	716
28	1288
29	1014
30	3004
31	1456
32	6436
33	2275
34	12871
35	4200
36	24312
37	9248
38	43776
39	22440
40	75736
41	55233
42	126940
43	131955
44	208336
45	301246
46	340120
47	655522
48	564928
49	1362935
50	980629
51	2718577

[1,0,1,0,1,0,1,0,1,1,1,5,1,15,1,35,1,70,2,126,10, 210,46,330,166,495,496,716,1288,1014,3004,1456, 6436,2275,12871,4200,24312,9248,43776,22440,75736, 55233,126940,131955,208336,301246,340120,655522, 564928,1362935,980629,2718577]