A264773 - OEIS

A264773 as a simple table

n	a(n)
0	1
1	4
2	1
3	28
4	5
5	1
6	220
7	36
8	6
9	1
10	1820
11	286
12	45
13	7
14	1
15	15504
16	2380
17	364
18	55
19	8
20	1
21	134596
22	20349
23	3060
24	455
25	66
26	9
27	1
28	1184040
29	177100
30	26334
31	3876
32	560
33	78
34	10
35	1
36	10518300
37	1560780
38	230230
39	33649
40	4845
41	680
42	91
43	11
44	1
45	94143280
46	13884156
47	2035800
48	296010
49	42504
50	5985
51	816
52	105
53	12
54	1

[1,4,1,28,5,1,220,36,6,1,1820,286,45,7,1,15504, 2380,364,55,8,1,134596,20349,3060,455,66,9,1, 1184040,177100,26334,3876,560,78,10,1,10518300, 1560780,230230,33649,4845,680,91,11,1,94143280, 13884156,2035800,296010,42504,5985,816,105,12,1]

[1,4,1,28,5,1,220,36,6,1,1820,286,45,7,1,15504,
 2380,364,55,8,1,134596,20349,3060,455,66,9,1,
 1184040,177100,26334,3876,560,78,10,1,10518300,
 1560780,230230,33649,4845,680,91,11,1,94143280,
 13884156,2035800,296010,42504,5985,816,105,12,1]