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A306599 as a simple table

na(n)
00
18
215
339
447
5109
6375
71591
84470
94596
106393
116718
127930
1316439
1428903
1534292
1649465
17264496
18265750
19266126
20311290
212067455
2216808764
2318276328
241074296036
251075478361

[0,8,15,39,47,109,375,1591,4470,4596,6393,6718,
 7930,16439,28903,34292,49465,264496,265750,266126,
 311290,2067455,16808764,18276328,1074296036,
 1075478361]