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A255713 as a simple table

n a(n)
1 3
2 9
3 33
4 120
5 480
6 2079
7 9044
8 39604
9 170835
10 720348
11 3105394
12 14050148
13 64838808
14 295178921
15 1315098518
16 5765163507
17 25132740083
18 110592507674
19 498297998116
20 2314042703759
21 10991409243669
22 52236818282458
23 242186086327901

[3,9,33,120,480,2079,9044,39604,170835,720348,
 3105394,14050148,64838808,295178921,1315098518,
 5765163507,25132740083,110592507674,498297998116,
 2314042703759,10991409243669,52236818282458,
 242186086327901]

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Last modified August 19 09:18 EDT 2024. Contains 375284 sequences. (Running on oeis4.)