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A294090 as a simple table

na(n)
15
218
335
450
5180
6315
7350
8500
91800
103150
113500
125000
1318000
1431500
1535000
1650000
17180000
18315000
19350000
20500000
211800000
223150000
233500000
245000000
2518000000
2631500000
2735000000
2850000000
29180000000
30315000000
31350000000
32500000000
331800000000

[5,18,35,50,180,315,350,500,1800,3150,3500,5000,
 18000,31500,35000,50000,180000,315000,350000,
 500000,1800000,3150000,3500000,5000000,18000000,
 31500000,35000000,50000000,180000000,315000000,
 350000000,500000000,1800000000]