A147496 - OEIS

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A147496 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	9
7	25
8	45
9	145
10	605
11	4313
12	20593
13	130161
14	816717
15	6861977
16	63223597
17	879585069
18	10212102803

[1,1,1,1,5,9,25,45,145,605,4313,20593,130161, 816717,6861977,63223597,879585069,10212102803]

[1,1,1,1,5,9,25,45,145,605,4313,20593,130161,
 816717,6861977,63223597,879585069,10212102803]