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A007317 as a simple table

n a(n)
1 1
2 2
3 5
4 15
5 51
6 188
7 731
8 2950
9 12235
10 51822
11 223191
12 974427
13 4302645
14 19181100
15 86211885
16 390248055
17 1777495635
18 8140539950
19 37463689775
20 173164232965
21 803539474345
22 3741930523740
23 17481709707825
24 81912506777200
25 384847173838501
26 1812610804416698

[1,2,5,15,51,188,731,2950,12235,51822,223191,
 974427,4302645,19181100,86211885,390248055,
 1777495635,8140539950,37463689775,173164232965,
 803539474345,3741930523740,17481709707825,
 81912506777200,384847173838501,1812610804416698]

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Last modified April 18 02:38 EDT 2021. Contains 343072 sequences. (Running on oeis4.)