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A111927 as a simple table

n a(n)
0 0
1 0
2 0
3 1
4 4
5 10
6 21
7 42
8 84
9 169
10 340
11 682
12 1365
13 2730
14 5460
15 10921
16 21844
17 43690
18 87381
19 174762
20 349524
21 699049
22 1398100
23 2796202
24 5592405
25 11184810
26 22369620
27 44739241
28 89478484
29 178956970
30 357913941
31 715827882
32 1431655764
33 2863311529
34 5726623060

[0,0,0,1,4,10,21,42,84,169,340,682,1365,2730,5460,
 10921,21844,43690,87381,174762,349524,699049,
 1398100,2796202,5592405,11184810,22369620,
 44739241,89478484,178956970,357913941,715827882,
 1431655764,2863311529,5726623060]

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)