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A038748 as a simple table

n a(n)
1 0
2 0
3 1
4 7
5 36
6 168
7 736
8 3151
9 13190
10 54938
11 226597
12 934200
13 3831219
14 15723801
15 64313623
16 263316219
17 1075420890
18 4396310382
19 17937457304
20 73247306563
21 298635873550
22 1218428664338

[0,0,1,7,36,168,736,3151,13190,54938,226597,
 934200,3831219,15723801,64313623,263316219,
 1075420890,4396310382,17937457304,73247306563,
 298635873550,1218428664338]

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Last modified April 25 01:06 EDT 2024. Contains 371964 sequences. (Running on oeis4.)