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A144768 as a simple table

na(n)
01
10
2-510
3-19677
4-262120
5-1953005
6-10076976
7-40348567
8-134177408
9-387057609
10-996371200
11-2318030891
12-4680778752
13-4377478573
1466517244416
151269231008625
1620854070411264
17355568840219503
186402175346437632
19121644777721134221
202432901496176640000
2151090941377429393419

[1,0,-510,-19677,-262120,-1953005,-10076976,
 -40348567,-134177408,-387057609,-996371200,
 -2318030891,-4680778752,-4377478573,66517244416,
 1269231008625,20854070411264,355568840219503,
 6402175346437632,121644777721134221,
 2432901496176640000,51090941377429393419]