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A224529 as a simple table

na(n)
01
12
26
326
4142
5876
65790
740020
8285582
92087612
1015551620
11117629724
12900964558
136973745924
1454464010540
15428645647572
163396238954446
1727067890450300
18216857021933172
191745460025192140
2014107695302434356
21114455036696796168
22931738743735004596

[1,2,6,26,142,876,5790,40020,285582,2087612,
 15551620,117629724,900964558,6973745924,
 54464010540,428645647572,3396238954446,
 27067890450300,216857021933172,1745460025192140,
 14107695302434356,114455036696796168,
 931738743735004596]