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A038200 as a simple table

na(n)
11
20
3-1
43
5-8
621
7-54
8134
9-318
10720
11-1560
123259
13-6641
1413391
15-27107
1655657
17-116244
18245823
19-521738
201101566
21-2299215
224730990
23-9601095
2419273729
25-38446742
2676598275
27-153119606
28308061214
29-624460449
301274268038
31-2611866713
325362888620
33-11003127203
3422516189988

[1,0,-1,3,-8,21,-54,134,-318,720,-1560,3259,-6641,
 13391,-27107,55657,-116244,245823,-521738,1101566,
 -2299215,4730990,-9601095,19273729,-38446742,
 76598275,-153119606,308061214,-624460449,
 1274268038,-2611866713,5362888620,-11003127203,
 22516189988]