A146429 - OEIS

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A146429 as a simple table

n	a(n)
1	1
2	1
3	3
4	9
5	19
6	53
7	531
8	5709
9	48307
10	490649
11	11283333
12	359196547
13	11541091447
14	440660012263
15	27722494439108
16	2548067434592087
17	280390489794224900

[1,1,3,9,19,53,531,5709,48307,490649,11283333, 359196547,11541091447,440660012263,27722494439108, 2548067434592087,280390489794224900]

[1,1,3,9,19,53,531,5709,48307,490649,11283333,
 359196547,11541091447,440660012263,27722494439108,
 2548067434592087,280390489794224900]