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A321399 as a simple table

na(n)
01
11
22
33
46
517
670
7401
82969
927140
10296824
113805050
1256375499
13955491092
1418372395618
15397763836270
169625919876062
17258564672432833
187659052858050807
19248738123007194830
208812695551133726251
21339191479636896892415
2214131494196304254373334

[1,1,2,3,6,17,70,401,2969,27140,296824,3805050,
 56375499,955491092,18372395618,397763836270,
 9625919876062,258564672432833,7659052858050807,
 248738123007194830,8812695551133726251,
 339191479636896892415,14131494196304254373334]