A248846 - OEIS

A248846 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	4
7	8
8	16
9	30
10	50
11	70
12	70
13	3
14	9
15	27
16	81
17	240
18	690
19	1890
20	4830
21	11130
22	22050
23	34650
24	34650
25	4
26	16
27	64
28	256
29	1020
30	4020
31	15540
32	58380
33	210840
34	722400
35	2310000
36	6745200
37	17417400
38	37837800
39	63063000
40	63063000
41	5
42	25
43	125
44	625
45	3120
46	15500
47	76300
48	370300
49	1761900
50	8166900
51	36613500
52	157426500
53	642642000
54	2459457000

[1,1,1,1,2,4,8,16,30,50,70,70,3,9,27,81,240,690, 1890,4830,11130,22050,34650,34650,4,16,64,256, 1020,4020,15540,58380,210840,722400,2310000, 6745200,17417400,37837800,63063000,63063000,5,25, 125,625,3120,15500,76300,370300,1761900,8166900, 36613500,157426500,642642000,2459457000]