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A117258 as a simple table

na(n)
01
11
21
3-2
44
51
632
7-32
816
91
10-2560
112048
12-512
1364
141
15917504
16-655360
17131072
18-8192
19256
201
21-1409286144
22939524096
23-167772160
248388608
25-131072
261024
271
289070970929152
29-5772436045824
30962072674304
31-42949672960
32536870912
33-2097152
344096
351

[1,1,1,-2,4,1,32,-32,16,1,-2560,2048,-512,64,1,
 917504,-655360,131072,-8192,256,1,-1409286144,
 939524096,-167772160,8388608,-131072,1024,1,
 9070970929152,-5772436045824,962072674304,
 -42949672960,536870912,-2097152,4096,1]