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A231034 as a simple table

na(n)
10
20
3736
417984
5783848
636327118
71587011224
869795938150
93103177507948
10137292888379012
116080196345816106
12269364486106376290
1311930608205466917572
14528463742288121797230
1523408232286089351072322

[0,0,736,17984,783848,36327118,1587011224,
 69795938150,3103177507948,137292888379012,
 6080196345816106,269364486106376290,
 11930608205466917572,528463742288121797230,
 23408232286089351072322]