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A239688 as a simple table

na(n)
12
222
3218
42100
520701
6202664
71990006
819519656
9191538146
101879225062
1118438413081
12180909222618
131775009067937
1417415641736474
15170875080099492
161676555203866592
1716449663882025188
18161397269556516646
191583562991844385082
2015537262462108603226

[2,22,218,2100,20701,202664,1990006,19519656,
 191538146,1879225062,18438413081,180909222618,
 1775009067937,17415641736474,170875080099492,
 1676555203866592,16449663882025188,
 161397269556516646,1583562991844385082,
 15537262462108603226]