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A318213 as a simple table

na(n)
18
2102
3329
42321
520502
6155972
71122773
88679924
965844976
10507320695
113880082075
1229828690068
13228795498352
141756171508386
1513486852207318
16103512846881063
17794948107621166
186103334633903798
1946863181424234369

[8,102,329,2321,20502,155972,1122773,8679924,
 65844976,507320695,3880082075,29828690068,
 228795498352,1756171508386,13486852207318,
 103512846881063,794948107621166,6103334633903798,
 46863181424234369]