A172249 - OEIS

A172249 as a simple table

n	a(n)
0	1
1	0
2	3
3	0
4	1
5	8
6	0
7	0
8	6
9	21
10	0
11	0
12	1
13	25
14	55
15	0
16	0
17	0
18	9
19	90
20	144
21	0
22	0
23	0
24	1
25	51
26	300
27	377
28	0
29	0
30	0
31	0
32	12
33	234
34	954
35	987
36	0
37	0
38	0
39	0
40	1
41	86
42	951
43	2939
44	2584
45	0
46	0
47	0
48	0
49	0
50	15
51	480
52	3573
53	8850
54	6765
55	0
56	0
57	0
58	0
59	0
60	1
61	130
62	2305
63	12707
64	26195
65	17711
66	0
67	0
68	0
69	0
70	0
71	0
72	18
73	855

[1,0,3,0,1,8,0,0,6,21,0,0,1,25,55,0,0,0,9,90,144, 0,0,0,1,51,300,377,0,0,0,0,12,234,954,987,0,0,0,0, 1,86,951,2939,2584,0,0,0,0,0,15,480,3573,8850, 6765,0,0,0,0,0,1,130,2305,12707,26195,17711,0,0,0, 0,0,0,18,855]