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A006876 as a simple table

n a(n)
1 1
2 0
3 1
4 3
5 11
6 20
7 57
8 108
9 240
10 472
11 1013
12 1959
13 4083
14 8052
15 16315
16 32496
17 65519
18 130464
19 262125
20 523209
21 1048353
22 2095084
23 4194281
24 8384100
25 16777120
26 33546216
27 67108068
28 134201223
29 268435427
30 536836484
31 1073741793
32 2147417952
33 4294964173
34 8589803488
35 17179868739

[1,0,1,3,11,20,57,108,240,472,1013,1959,4083,8052,
 16315,32496,65519,130464,262125,523209,1048353,
 2095084,4194281,8384100,16777120,33546216,
 67108068,134201223,268435427,536836484,1073741793,
 2147417952,4294964173,8589803488,17179868739]

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Last modified March 28 15:58 EDT 2024. Contains 371254 sequences. (Running on oeis4.)