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A009810 as a simple table

na(n)
00
11
22
33
44
5-3
6-42
7-273
8-1336
9-5159
10-16726
1162139
121194700
1316414101
14153304830
151357293927
1610698400400
1759192332081
18188012481362
19-5204089208589
20-107922523124588
21-1943937262679379
22-26275693823306202

[0,1,2,3,4,-3,-42,-273,-1336,-5159,-16726,62139,
 1194700,16414101,153304830,1357293927,10698400400,
 59192332081,188012481362,-5204089208589,
 -107922523124588,-1943937262679379,
 -26275693823306202]