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A163286 as a simple table

na(n)
115
228
388
4245
5396
6979
71505
83421
944567
1062377
11225638
12307077
13415910
141006279
154059132
166924325
1766615465
18107240563
19135624475
20270973120
21425688314
22663855038
231581563676
242417635935
252982269752
263673314756
274517918038
285548822508
298335344604
3015194335989

[15,28,88,245,396,979,1505,3421,44567,62377,
 225638,307077,415910,1006279,4059132,6924325,
 66615465,107240563,135624475,270973120,425688314,
 663855038,1581563676,2417635935,2982269752,
 3673314756,4517918038,5548822508,8335344604,
 15194335989]