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A089406 as a simple table

na(n)
01
11
21
33
46
516
637
795
8238
9624
101650
114478
1212356
1334756
1499313
15288145
16847366
172523092
187597834
1923117382
2071007196

[1,1,1,3,6,16,37,95,238,624,1650,4478,12356,34756,
 99313,288145,847366,2523092,7597834,23117382,
 71007196]