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A166452 as a simple table

n a(n)
-1 1
0 3
1 9
2 21
3 45
4 99
5 225
6 507
7 1101
8 2295
9 4653
10 9381
11 19221
12 40491
13 87453
14 191205
15 417117
16 898119
17 1897125
18 3922977
19 7945713
20 15800367
21 30960765
22 60068235
23 116058981
24 224778159
25 439342677
26 871864317
27 1764029985
28 3643978479
29 7672441101
30 16397598555
31 35377739037

[1,3,9,21,45,99,225,507,1101,2295,4653,9381,19221,
 40491,87453,191205,417117,898119,1897125,3922977,
 7945713,15800367,30960765,60068235,116058981,
 224778159,439342677,871864317,1764029985,
 3643978479,7672441101,16397598555,35377739037]

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Last modified June 25 03:40 EDT 2021. Contains 345449 sequences. (Running on oeis4.)