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A177111 as a simple table

na(n)
01
11
2-2
3-9
4-30
5-84
6-204
7-389
8-326
91780
1013156
1157452
12197552
13551846
141138832
15752911
16-8109806
17-57353648
18-255573404
19-898715548
20-2539157248
21-5106161134
22-1629827488
2350275158584
24330772150256
251453122571658

[1,1,-2,-9,-30,-84,-204,-389,-326,1780,13156,
 57452,197552,551846,1138832,752911,-8109806,
 -57353648,-255573404,-898715548,-2539157248,
 -5106161134,-1629827488,50275158584,330772150256,
 1453122571658]