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A171792 as a simple table

na(n)
11
21
32
47
534
6214
71652
815121
9160110
101925442
1125924260
12386354366
136314171932
14112286067892
152158562109096
1644605949528355
17986049177712850
1823218586050641090
19580198948211652348
2015334750335623526670
21427408226085246086676
2212528910074528593086980

[1,1,2,7,34,214,1652,15121,160110,1925442,
 25924260,386354366,6314171932,112286067892,
 2158562109096,44605949528355,986049177712850,
 23218586050641090,580198948211652348,
 15334750335623526670,427408226085246086676,
 12528910074528593086980]