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A012709 as a simple table

na(n)
01
11
23
312
457
5340
62305
718186
8158977
91560840
1016695553
11196272142
122483596577
1334036624700
14497515462561
157792454528002
16129248702613505
172278494692749840
1842291311707716609
19828953188249846678

[1,1,3,12,57,340,2305,18186,158977,1560840,
 16695553,196272142,2483596577,34036624700,
 497515462561,7792454528002,129248702613505,
 2278494692749840,42291311707716609,
 828953188249846678]