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A279198 as a simple table

na(n)
10
20
30
42
57
652
7297
81994
914594
10113794
11991741
129199390
1394105010
141015012796
1511914379971
16146974330141
171954701366709

[0,0,0,2,7,52,297,1994,14594,113794,991741,
 9199390,94105010,1015012796,11914379971,
 146974330141,1954701366709]