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A189844 as a simple table

na(n)
11
22
36
422
598
6534
73334
823724
9191820
101704532
1116689868
12179288892
132069311996
1425760882744
15345073745880
164900331447624

[1,2,6,22,98,534,3334,23724,191820,1704532,
 16689868,179288892,2069311996,25760882744,
 345073745880,4900331447624]