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A290068 as a simple table

n a(n)
0 1
1 2
2 6
3 15
4 31
5 60
6 124
7 254
8 510
9 1015
10 2039
11 4088
12 8184
13 16376
14 32760
15 65528
16 131064
17 261944
18 524088
19 1048504
20 2097080
21 4194216
22 8388520
23 16777176
24 33554392
25 67108340
26 134217204
27 268435388
28 536870844
29 1073741310
30 2147483134
31 4294967257
32 8589934553

[1,2,6,15,31,60,124,254,510,1015,2039,4088,8184,
 16376,32760,65528,131064,261944,524088,1048504,
 2097080,4194216,8388520,16777176,33554392,
 67108340,134217204,268435388,536870844,1073741310,
 2147483134,4294967257,8589934553]

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Last modified August 13 08:34 EDT 2020. Contains 336442 sequences. (Running on oeis4.)