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A209397 as a simple table

n a(n)
1 1
2 3
3 7
4 19
5 46
6 129
7 337
8 939
9 2581
10 7238
11 20263
12 57337
13 162319
14 461961
15 1317217
16 3767035
17 10792400
18 30983565
19 89084845
20 256531814
21 739658815
22 2135234247
23 6170505666
24 17849457873
25 51679366171
26 149750711581
27 434260829464
28 1260198317509
29 3659410074933

[1,3,7,19,46,129,337,939,2581,7238,20263,57337,
 162319,461961,1317217,3767035,10792400,30983565,
 89084845,256531814,739658815,2135234247,
 6170505666,17849457873,51679366171,149750711581,
 434260829464,1260198317509,3659410074933]

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Last modified February 25 11:08 EST 2018. Contains 299653 sequences. (Running on oeis4.)