A180771 - OEIS

A180771 as a simple table

n	a(n)
1	0
2	1
3	1
4	1
5	3
6	1
7	2
8	11
9	11
10	2
11	3
12	34
13	63
14	34
15	3
16	5
17	111
18	390
19	390
20	111
21	5
22	8
23	361
24	2385
25	4475
26	2385
27	361
28	8
29	13
30	1172
31	14621
32	52186
33	52186
34	14621
35	1172
36	13
37	21
38	3809
39	89602
40	606546
41	1154119
42	606546
43	89602
44	3809
45	21
46	34
47	12377
48	549125
49	7053923
50	25448809
51	25448809

[0,1,1,1,3,1,2,11,11,2,3,34,63,34,3,5,111,390,390, 111,5,8,361,2385,4475,2385,361,8,13,1172,14621, 52186,52186,14621,1172,13,21,3809,89602,606546, 1154119,606546,89602,3809,21,34,12377,549125, 7053923,25448809,25448809]