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A145405 as a simple table

na(n)
120
22984
3340852
440071100
54696965476
6550730736140
764572426811780
87571054816109868
9887698562638519076
10104081767587749759756
1112203482981057263416260
121430846154730977823707628
13167765278289617542860512868
1419670310820391775621430114508

[20,2984,340852,40071100,4696965476,550730736140,
 64572426811780,7571054816109868,
 887698562638519076,104081767587749759756,
 12203482981057263416260,1430846154730977823707628,
 167765278289617542860512868,
 19670310820391775621430114508]