A298854 - OEIS

A298854 as a simple table

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	2
6	6
7	11
8	11
9	6
10	24
11	50
12	61
13	50
14	24
15	120
16	274
17	379
18	379
19	274
20	120
21	720
22	1764
23	2668
24	3023
25	2668
26	1764
27	720
28	5040
29	13068
30	21160
31	26193
32	26193
33	21160
34	13068
35	5040
36	40320
37	109584
38	187388
39	248092
40	270961
41	248092
42	187388
43	109584
44	40320
45	362880
46	1026576
47	1836396
48	2565080
49	2995125
50	2995125
51	2565080
52	1836396
53	1026576
54	362880

[1,1,1,2,3,2,6,11,11,6,24,50,61,50,24,120,274,379, 379,274,120,720,1764,2668,3023,2668,1764,720,5040, 13068,21160,26193,26193,21160,13068,5040,40320, 109584,187388,248092,270961,248092,187388,109584, 40320,362880,1026576,1836396,2565080,2995125, 2995125,2565080,1836396,1026576,362880]