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A218321 as a simple table

na(n)
01
12
28
339
4212
51230
67458
746689
8299463
91957723
1012996879
1187383754
12593794311
134071599216
1428136612051
15195756911831
161370068168916
179639404836227
1868138551870047
19483682445360748
203446462104490724
2124642148415136556
22176743014104068411

[1,2,8,39,212,1230,7458,46689,299463,1957723,
 12996879,87383754,593794311,4071599216,
 28136612051,195756911831,1370068168916,
 9639404836227,68138551870047,483682445360748,
 3446462104490724,24642148415136556,
 176743014104068411]