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A303360 as a simple table

n a(n)
0 1
1 2
2 4
3 18
4 34
5 166
6 384
7 1902
8 4756
9 24022
10 64284
11 321542
12 899658
13 4455690
14 12888944
15 63185250
16 187513426
17 910880550
18 2759413788
19 13295839638
20 40967821494
21 195979968882
22 612569599440
23 2911592648458
24 9213101043936
25 43538337410474
26 139246245625364

[1,2,4,18,34,166,384,1902,4756,24022,64284,321542,
 899658,4455690,12888944,63185250,187513426,
 910880550,2759413788,13295839638,40967821494,
 195979968882,612569599440,2911592648458,
 9213101043936,43538337410474,139246245625364]

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Last modified March 2 19:18 EST 2021. Contains 341756 sequences. (Running on oeis4.)