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A241278 as a simple table

n a(n)
1 3
2 3
3 9
4 36
5 139
6 532
7 2111
8 8473
9 34053
10 136880
11 550213
12 2211810
13 8891567
14 35744766
15 143696235
16 577666729
17 2322248891
18 9335550407
19 37529342193
20 150869654682
21 606502776180
22 2438168211361
23 9801544653549
24 39402644818707
25 158400380771179

[3,3,9,36,139,532,2111,8473,34053,136880,550213,
 2211810,8891567,35744766,143696235,577666729,
 2322248891,9335550407,37529342193,150869654682,
 606502776180,2438168211361,9801544653549,
 39402644818707,158400380771179]

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Last modified June 5 03:12 EDT 2020. Contains 334828 sequences. (Running on oeis4.)