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A216912 as a simple table

na(n)
16
220
3315
4280
566
63003
778
89520
9305235
1020900
11138
1219734
136
147540
1515575175
16590240
176
18107666559
19222
2011996600
2150536395
2219780
23282
2431534932
2566
261060
2748532365
28738920
29354
3083912718435
31366
321180480
33485415
341340
3560918
363667092237666
37438
38740

[6,20,315,280,66,3003,78,9520,305235,20900,138,
 19734,6,7540,15575175,590240,6,107666559,222,
 11996600,50536395,19780,282,31534932,66,1060,
 48532365,738920,354,83912718435,366,1180480,
 485415,1340,60918,3667092237666,438,740]