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A005717 as a simple table

n a(n)
1 1
2 2
3 6
4 16
5 45
6 126
7 357
8 1016
9 2907
10 8350
11 24068
12 69576
13 201643
14 585690
15 1704510
16 4969152
17 14508939
18 42422022
19 124191258
20 363985680
21 1067892399
22 3136046298
23 9217554129
24 27114249960
25 79818194925
26 235128465026
27 693085098852
28 2044217638456
29 6032675068061

[1,2,6,16,45,126,357,1016,2907,8350,24068,69576,
 201643,585690,1704510,4969152,14508939,42422022,
 124191258,363985680,1067892399,3136046298,
 9217554129,27114249960,79818194925,235128465026,
 693085098852,2044217638456,6032675068061]

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Last modified February 23 11:12 EST 2018. Contains 299564 sequences. (Running on oeis4.)