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A368489 as a simple table

na(n)
01
13
231
3643
420421
5873806
646994011
73042431715
8230249448841
919940350062394
101944516598602711
11210829412453667998
1225156743053019602701
133275876521195372322892
14462262670054775645538099
1570264375447526610838701091

[1,3,31,643,20421,873806,46994011,3042431715,
 230249448841,19940350062394,1944516598602711,
 210829412453667998,25156743053019602701,
 3275876521195372322892,462262670054775645538099,
 70264375447526610838701091]