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A198961 as a simple table

na(n)
03
135
2323
32915
426243
5236195
62125763
719131875
8172186883
91549681955
1013947137603
11125524238435
121129718145923
1310167463313315
1491507169819843
15823564528378595
167412080755407363
1766708726798666275
18600378541187996483

[3,35,323,2915,26243,236195,2125763,19131875,
 172186883,1549681955,13947137603,125524238435,
 1129718145923,10167463313315,91507169819843,
 823564528378595,7412080755407363,
 66708726798666275,600378541187996483]