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A366699 as a simple table

na(n)
01
14
219
3173
41860
521814
6271388
73515330
846906860
9640321565
108899950644
11125524292790
121791943900656
1325843064347685
14375956017001280
155510454405453368
1681297696816798684
171206334991431968912
1817991734573723974384
19269560224872407933010

[1,4,19,173,1860,21814,271388,3515330,46906860,
 640321565,8899950644,125524292790,1791943900656,
 25843064347685,375956017001280,5510454405453368,
 81297696816798684,1206334991431968912,
 17991734573723974384,269560224872407933010]