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A130668 as a simple table

na(n)
00
10
21
3-2
45
5-11
623
7-48
8102
9-220
10476
11-1024
122184
13-4624
149744
15-20480
1642976
17-90048
18188352
19-393216
20819328
21-1704192
223539200
23-7340032
2415203840
25-31456256
2665010688
27-134217728
28276826112
29-570429440
301174409216

[0,0,1,-2,5,-11,23,-48,102,-220,476,-1024,2184,
 -4624,9744,-20480,42976,-90048,188352,-393216,
 819328,-1704192,3539200,-7340032,15203840,
 -31456256,65010688,-134217728,276826112,
 -570429440,1174409216]