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A274626 as a simple table

n a(n)
0 0
1 0
2 0
3 1
4 3
5 9
6 27
7 63
8 147
9 343
10 735
11 1575
12 3375
13 6975
14 14415
15 29791
16 60543
17 123039
18 250047
19 504063
20 1016127
21 2048383
22 4112895
23 8258175
24 16581375
25 33227775
26 66585855
27 133432831
28 267126783
29 534776319
30 1070599167
31 2142244863
32 4286583807
33 8577357823
34 17158905855
35 34326194175
36 68669157375

[0,0,0,1,3,9,27,63,147,343,735,1575,3375,6975,
 14415,29791,60543,123039,250047,504063,1016127,
 2048383,4112895,8258175,16581375,33227775,
 66585855,133432831,267126783,534776319,1070599167,
 2142244863,4286583807,8577357823,17158905855,
 34326194175,68669157375]

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Last modified April 24 15:57 EDT 2024. Contains 371961 sequences. (Running on oeis4.)