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A167617 as a simple table

na(n)
00
10
23
3-6
410
5-21
642
7-84
8171
9-342
10682
11-1365
122730
13-5460
1410923
15-21846
1643690
17-87381
18174762
19-349524
20699051
21-1398102
222796202
23-5592405
2411184810
25-22369620
2644739243
27-89478486
28178956970
29-357913941
30715827882
31-1431655764
322863311531

[0,0,3,-6,10,-21,42,-84,171,-342,682,-1365,2730,
 -5460,10923,-21846,43690,-87381,174762,-349524,
 699051,-1398102,2796202,-5592405,11184810,
 -22369620,44739243,-89478486,178956970,-357913941,
 715827882,-1431655764,2863311531]