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A017722 as a simple table

na(n)
581
5959
601770
6135990
62557845
637028847
6474974368
65696190560
665743572120
6742757703560
68290752384208
691823810410032
7010638894058520
7158104729088840
72298824321028320
731454278362337824
746726037425812436

[1,59,1770,35990,557845,7028847,74974368,
 696190560,5743572120,42757703560,290752384208,
 1823810410032,10638894058520,58104729088840,
 298824321028320,1454278362337824,6726037425812436]