A147382 - OEIS

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A147382 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	3
10	11
11	25
12	47
13	101
14	257
15	681
16	1819
17	5437
18	17747
19	62109
20	244571
21	1025085
22	4586657
23	22318221

[1,1,1,1,1,1,1,1,3,11,25,47,101,257,681,1819,5437, 17747,62109,244571,1025085,4586657,22318221]