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A125128 as a simple table

n a(n)
1 1
2 4
3 11
4 26
5 57
6 120
7 247
8 502
9 1013
10 2036
11 4083
12 8178
13 16369
14 32752
15 65519
16 131054
17 262125
18 524268
19 1048555
20 2097130
21 4194281
22 8388584
23 16777191
24 33554406
25 67108837
26 134217700
27 268435427
28 536870882
29 1073741793
30 2147483616
31 4294967263
32 8589934558

[1,4,11,26,57,120,247,502,1013,2036,4083,8178,
 16369,32752,65519,131054,262125,524268,1048555,
 2097130,4194281,8388584,16777191,33554406,
 67108837,134217700,268435427,536870882,1073741793,
 2147483616,4294967263,8589934558]

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Last modified March 30 19:12 EDT 2020. Contains 333127 sequences. (Running on oeis4.)