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A198074 as a simple table

na(n)
1512
23815
350805
4452377
52779906
612895977
748400258
8154315776
9432655358
101093685273
112539243268
125491371251
1311182788770
1421629362253
1540008716648
1671173490664
17122332454247
18203937787267
19330822261551

[512,3815,50805,452377,2779906,12895977,48400258,
 154315776,432655358,1093685273,2539243268,
 5491371251,11182788770,21629362253,40008716648,
 71173490664,122332454247,203937787267,
 330822261551]