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A013335 as a simple table

na(n)
00
11
20
3-1
4-4
5-3
660
7107
8-264
9-11175
10-40200
11142903
122392436
138175637
14-327277132
15-3256146845
16-19824913424
17184016913969
181628105059824
19-33266797736465
20-1067099983418644
21-14633634217342547
22-39212918007355092
23458935991667836379

[0,1,0,-1,-4,-3,60,107,-264,-11175,-40200,142903,
 2392436,8175637,-327277132,-3256146845,
 -19824913424,184016913969,1628105059824,
 -33266797736465,-1067099983418644,
 -14633634217342547,-39212918007355092,
 458935991667836379]