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A068724 as a simple table

na(n)
01
1569397
21305759171
3251611610655
413336307324915
5322309309862183
64598900066440609
744976296745414509
8331136639667811845
91954290045098180729
109661874271897648847
1141320247284448146619
12156588834507399529975

[1,569397,1305759171,251611610655,13336307324915,
 322309309862183,4598900066440609,
 44976296745414509,331136639667811845,
 1954290045098180729,9661874271897648847,
 41320247284448146619,156588834507399529975]