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A026387 as a simple table

n a(n)
0 2
1 8
2 34
3 150
4 678
5 3116
6 14494
7 68032
8 321590
9 1528776
10 7301142
11 35003238
12 168359754
13 812041860
14 3926147730
15 19022666310
16 92338836390
17 448968093320
18 2186194166950
19 10659569748370
20 52037098259090
21 254308709196660

[2,8,34,150,678,3116,14494,68032,321590,1528776,
 7301142,35003238,168359754,812041860,3926147730,
 19022666310,92338836390,448968093320,
 2186194166950,10659569748370,52037098259090,
 254308709196660]

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)