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A081209 as a simple table

na(n)
01
10
23
320
4205
52604
639991
7720600
814913081
9348678440
109090909091
11261535698060
128230246567621
13281241170407092
1410371206370520815
15410525522232055664
1617361641481138401521
17781282469559318055056
1837275544492386193492507
191879498672877297909667780

[1,0,3,20,205,2604,39991,720600,14913081,
 348678440,9090909091,261535698060,8230246567621,
 281241170407092,10371206370520815,
 410525522232055664,17361641481138401521,
 781282469559318055056,37275544492386193492507,
 1879498672877297909667780]