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A239995 as a simple table

n a(n)
1 3
2 13
3 61
4 256
5 1117
6 5012
7 22592
8 102336
9 465662
10 2123857
11 9698188
12 44317651
13 202610817
14 926532786
15 4237612923
16 19382872561
17 88661747469
18 405570672096
19 1855255219753
20 8486814865920
21 38822908166872
22 177595801954595

[3,13,61,256,1117,5012,22592,102336,465662,
 2123857,9698188,44317651,202610817,926532786,
 4237612923,19382872561,88661747469,405570672096,
 1855255219753,8486814865920,38822908166872,
 177595801954595]

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Last modified April 1 12:55 EDT 2023. Contains 361691 sequences. (Running on oeis4.)