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A034771 as a simple table

n a(n)
1 1
2 4
3 6
4 15
5 18
6 48
7 66
8 154
9 267
10 552
11 1026
12 2154
13 4098
14 8328
15 16428
16 33061
17 65538
18 131676
19 262146
20 525390
21 1048716
22 2099208
23 4194306
24 8393124
25 16777251
26 33562632
27 67109392
28 134234334
29 268435458
30 536904864
31 1073741826
32 2147549616

[1,4,6,15,18,48,66,154,267,552,1026,2154,4098,
 8328,16428,33061,65538,131676,262146,525390,
 1048716,2099208,4194306,8393124,16777251,33562632,
 67109392,134234334,268435458,536904864,1073741826,
 2147549616]

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Last modified October 21 08:57 EDT 2021. Contains 348150 sequences. (Running on oeis4.)