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A005445 as a simple table

na(n)
00
11
21
38
416
5224
6608
713320
841760
91366152
104440312
11215100192
12655723440
1348242081328
14121651212720
1514627299801728
1624367884018048
175768946415383552
182780730890516736
192872938805170308352
20-2941729703083507968
211764460446550873413120

[0,1,1,8,16,224,608,13320,41760,1366152,4440312,
 215100192,655723440,48242081328,121651212720,
 14627299801728,24367884018048,5768946415383552,
 2780730890516736,2872938805170308352,
 -2941729703083507968,1764460446550873413120]