A034563 - OEIS

A034563 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	0
22	0
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0
31	1
32	7
33	23
34	72
35	197
36	541
37	1404
38	3606
39	9111
40	22923
41	57253
42	142684
43	354204
44	876565
45	2160195
46	5299244
47	12929446
48	31360601
49	75576940
50	180905035
51	429980931
52	1014653642

[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,1,7,23,72,197,541,1404,3606,9111, 22923,57253,142684,354204,876565,2160195,5299244, 12929446,31360601,75576940,180905035,429980931, 1014653642]