A254881 - OEIS

A254881 as a simple table

n	a(n)
0	1
1	0
2	1
3	1
4	0
5	2
6	5
7	4
8	1
9	0
10	12
11	40
12	51
13	31
14	9
15	1
16	0
17	144
18	564
19	904
20	769
21	376
22	106
23	16
24	1
25	0
26	2880
27	12576
28	23300
29	24080
30	15345
31	6273
32	1650
33	270
34	25
35	1
36	0
37	86400
38	408960
39	840216
40	991276
41	748530
42	381065
43	133848
44	32523
45	5370
46	575
47	36
48	1
49	0
50	3628800
51	18299520

[1,0,1,1,0,2,5,4,1,0,12,40,51,31,9,1,0,144,564, 904,769,376,106,16,1,0,2880,12576,23300,24080, 15345,6273,1650,270,25,1,0,86400,408960,840216, 991276,748530,381065,133848,32523,5370,575,36,1,0, 3628800,18299520]