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A283117 as a simple table

n a(n)
1 2
2 2
3 4
4 8
5 19
6 51
7 169
8 592
9 2281
10 9268
11 39521
12 175875
13 813780
14 3903533
15 19367571
16 99208196
17 523695465
18 2844708347
19 15877906262
20 90955375095
21 534101204061 

[2,2,4,8,19,51,169,592,2281,9268,39521,175875,
 813780,3903533,19367571,99208196,523695465,
 2844708347,15877906262,90955375095,534101204061]

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Last modified April 23 10:29 EDT 2024. Contains 371905 sequences. (Running on oeis4.)