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A151575 as a simple table

na(n)
01
10
22
3-2
46
5-10
622
7-42
886
9-170
10342
11-682
121366
13-2730
145462
15-10922
1621846
17-43690
1887382
19-174762
20349526
21-699050
221398102
23-2796202
245592406
25-11184810
2622369622
27-44739242
2889478486
29-178956970
30357913942
31-715827882
321431655766
33-2863311530
345726623062

[1,0,2,-2,6,-10,22,-42,86,-170,342,-682,1366,
 -2730,5462,-10922,21846,-43690,87382,-174762,
 349526,-699050,1398102,-2796202,5592406,-11184810,
 22369622,-44739242,89478486,-178956970,357913942,
 -715827882,1431655766,-2863311530,5726623062]