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A218065 as a simple table

n a(n)
1 4
2 6
3 18
4 42
5 108
6 268
7 676
8 1694
9 4258
10 10690
11 26852
12 67436
13 169372
14 425382
15 1068370
16 2683258
17 6739132
18 16925644
19 42509556
20 106764750
21 268144706
22 673458066
23 1691421684
24 4248085292
25 10669266476
26 26796365718
27 67300335730
28 169027965834

[4,6,18,42,108,268,676,1694,4258,10690,26852,
 67436,169372,425382,1068370,2683258,6739132,
 16925644,42509556,106764750,268144706,673458066,
 1691421684,4248085292,10669266476,26796365718,
 67300335730,169027965834]

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)