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A168513 as a simple table

na(n)
121
236
3300
4722
52493
64766
79459
813091
918484
1018779
1118048
1212995
139122
144424
152160
16639
17234
1848
198
200
210

[21,36,300,722,2493,4766,9459,13091,18484,18779,
 18048,12995,9122,4424,2160,639,234,48,8,0,0]