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A106435 as a simple table

n a(n)
0 0
1 3
2 9
3 36
4 135
5 513
6 1944
7 7371
8 27945
9 105948
10 401679
11 1522881
12 5773680
13 21889683
14 82990089
15 314639316
16 1192888215
17 4522582593
18 17146412424
19 65006985051
20 246460192425
21 934401532428
22 3542585174559
23 13430960120961

[0,3,9,36,135,513,1944,7371,27945,105948,401679,
 1522881,5773680,21889683,82990089,314639316,
 1192888215,4522582593,17146412424,65006985051,
 246460192425,934401532428,3542585174559,
 13430960120961]

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Last modified February 16 21:59 EST 2019. Contains 320200 sequences. (Running on oeis4.)