A397489 - OEIS

A397489 as a simple table

n	a(n)
0	1
1	1
2	0
3	0
4	1
5	1
6	0
7	0
8	1
9	3
10	0
11	0
12	12
13	12
14	0
15	0
16	65
17	115
18	0
19	0
20	507
21	972
22	0
23	0
24	4931
25	8586
26	0
27	0
28	49845
29	86086
30	0
31	0
32	517481
33	931253
34	0
35	0
36	5643431
37	10439967
38	0
39	0
40	64489578
41	120255030
42	0
43	0
44	762585871
45	1422072284
46	0
47	0
48	9238616655
49	17252409833
50	0
51	0
52	114139783947
53	214024316649

[1,1,0,0,1,1,0,0,1,3,0,0,12,12,0,0,65,115,0,0,507, 972,0,0,4931,8586,0,0,49845,86086,0,0,517481, 931253,0,0,5643431,10439967,0,0,64489578, 120255030,0,0,762585871,1422072284,0,0,9238616655, 17252409833,0,0,114139783947,214024316649]