A266825 - OEIS

A266825 as a simple table

n	a(n)
1	1
2	1
3	0
4	1
5	0
6	1
7	1
8	0
9	0
10	2
11	1
12	0
13	1
14	1
15	9
16	1
17	0
18	4
19	16
20	86
21	44
22	1
23	0
24	10
25	133
26	3335
27	4701
28	265
29	1
30	0
31	25
32	1236
33	242563
34	2320408
35	378116
36	1854
37	1
38	0
39	45
40	15125
41	34126530
42	1900782587
43	2535597415
44	41728537
45	14833
46	1
47	0
48	120
49	214140
50	5123428157
51	1909319290122

[1,1,0,1,0,1,1,0,0,2,1,0,1,1,9,1,0,4,16,86,44,1,0, 10,133,3335,4701,265,1,0,25,1236,242563,2320408, 378116,1854,1,0,45,15125,34126530,1900782587, 2535597415,41728537,14833,1,0,120,214140, 5123428157,1909319290122]