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A247720 as a simple table

n a(n)
1 48
2 90
3 172
4 334
5 656
6 1300
7 2584
8 5148
9 10272
10 20520
11 41008
12 81976
13 163904
14 327760
15 655456
16 1310832
17 2621568
18 5243040
19 10485952
20 20971744
21 41943296
22 83886400
23 167772544
24 335544768
25 671089152
26 1342177920
27 2684355328
28 5368710016

[48,90,172,334,656,1300,2584,5148,10272,20520,
 41008,81976,163904,327760,655456,1310832,2621568,
 5243040,10485952,20971744,41943296,83886400,
 167772544,335544768,671089152,1342177920,
 2684355328,5368710016]

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Last modified December 1 16:44 EST 2021. Contains 349430 sequences. (Running on oeis4.)