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A245023 as a simple table

n a(n)
1 3
2 3
3 9
4 39
5 153
6 543
7 1809
8 5799
9 18153
10 55983
11 171009
12 519159
13 1569753
14 4733823
15 14250609
16 42850119
17 128746953
18 386634063
19 1160688609
20 3483638679
21 10454061753
22 31368476703
23 94118013009
24 282379204839
25 847187946153
26 2541664501743
27 7625194831809
28 22875987148599
29 68628766752153
30 205887910869183
31 617666953833009

[3,3,9,39,153,543,1809,5799,18153,55983,171009,
 519159,1569753,4733823,14250609,42850119,
 128746953,386634063,1160688609,3483638679,
 10454061753,31368476703,94118013009,282379204839,
 847187946153,2541664501743,7625194831809,
 22875987148599,68628766752153,205887910869183,
 617666953833009]

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Last modified July 9 18:08 EDT 2020. Contains 335545 sequences. (Running on oeis4.)