A325720 - OEIS

A325720 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	1
22	2
23	5
24	10
25	20
26	36
27	64
28	101
29	166
30	254
31	388
32	568
33	830
34	1169
35	1645
36	2270
37	3096
38	4161
39	5556
40	7312
41	9572
42	12402
43	15962
44	20386
45	25851
46	32595
47	40850
48	50938
49	63148
50	77979
51	95773
52	117231
53	142777
54	173387

[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,5,10, 20,36,64,101,166,254,388,568,830,1169,1645,2270, 3096,4161,5556,7312,9572,12402,15962,20386,25851, 32595,40850,50938,63148,77979,95773,117231,142777, 173387]