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A110524 as a simple table

na(n)
01
1-1
22
3-6
414
5-32
676
7-180
8424
9-1000
102360
11-5568
1213136
13-30992
1473120
15-172512
16407008
17-960256
182265536
19-5345088
2012610688
21-29752448
2270195072
23-165611520
24390727936
25-921846016
262174915072
27-5131286016
2812106264064
29-28562358272
3067387288576
31-158987105280

[1,-1,2,-6,14,-32,76,-180,424,-1000,2360,-5568,
 13136,-30992,73120,-172512,407008,-960256,2265536,
 -5345088,12610688,-29752448,70195072,-165611520,
 390727936,-921846016,2174915072,-5131286016,
 12106264064,-28562358272,67387288576,
 -158987105280]