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A175976 as a simple table

n a(n)
0 2
1 2
2 11
3 56
4 245
5 1010
6 4079
7 16364
8 65513
9 262118
10 1048547
11 4194272
12 16777181
13 67108826
14 268435415
15 1073741780
16 4294967249
17 17179869134
18 68719476683
19 274877906888
20 1099511627717
21 4398046511042
22 17592186044351
23 70368744177596

[2,2,11,56,245,1010,4079,16364,65513,262118,
 1048547,4194272,16777181,67108826,268435415,
 1073741780,4294967249,17179869134,68719476683,
 274877906888,1099511627717,4398046511042,
 17592186044351,70368744177596]

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Last modified May 23 15:11 EDT 2024. Contains 372763 sequences. (Running on oeis4.)