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A299853 as a simple table

na(n)
01
112
212
3-24
496
5-504
63072
7-20592
8147456
9-1108536
108650752
11-69535440
12572522496
13-4808643120
1441070624768
15-355839590880
163121367482368
17-27676994061240
18247750893502464
19-2236495344667920
2020341652308623360
21-186268112277342480
221716095758400225280
23-15898314689790251040
24148031912376784650240
25-1384743209480730865584
2613008588976864521879552

[1,12,12,-24,96,-504,3072,-20592,147456,-1108536,
 8650752,-69535440,572522496,-4808643120,
 41070624768,-355839590880,3121367482368,
 -27676994061240,247750893502464,-2236495344667920,
 20341652308623360,-186268112277342480,
 1716095758400225280,-15898314689790251040,
 148031912376784650240,-1384743209480730865584,
 13008588976864521879552]