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A222632 as a simple table

na(n)
15
222
367
4707
53200
631574
7160614
81732653
99034170
1098521493
11520153629
125732786567
1330465987916
14337740123987
151803766268924
1620083828051731
17107676281160198
181202858848461003
196469195403317397
2072456284150820802

[5,22,67,707,3200,31574,160614,1732653,9034170,
 98521493,520153629,5732786567,30465987916,
 337740123987,1803766268924,20083828051731,
 107676281160198,1202858848461003,6469195403317397,
 72456284150820802]