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A193522 as a simple table

na(n)
-11
0-4
114
2-36
385
4-180
5360
6-684
71246
8-2196
93754
10-6264
1110226
12-16380
1325804
14-40032
1561275
16-92628
17138452
18-204804
19300040
20-435672
21627356
22-896400
231271525
24-1791324
252507426
26-3488472
274825531
28-6638688
299085888
30-12373992

[1,-4,14,-36,85,-180,360,-684,1246,-2196,3754,
 -6264,10226,-16380,25804,-40032,61275,-92628,
 138452,-204804,300040,-435672,627356,-896400,
 1271525,-1791324,2507426,-3488472,4825531,
 -6638688,9085888,-12373992]