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A052925 as a simple table

n a(n)
0 2
1 2
2 4
3 9
4 22
5 56
6 145
7 378
8 988
9 2585
10 6766
11 17712
12 46369
13 121394
14 317812
15 832041
16 2178310
17 5702888
18 14930353
19 39088170
20 102334156
21 267914297
22 701408734
23 1836311904
24 4807526977
25 12586269026
26 32951280100
27 86267571273

[2,2,4,9,22,56,145,378,988,2585,6766,17712,46369,
 121394,317812,832041,2178310,5702888,14930353,
 39088170,102334156,267914297,701408734,1836311904,
 4807526977,12586269026,32951280100,86267571273]

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Last modified April 16 02:41 EDT 2024. Contains 371696 sequences. (Running on oeis4.)