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A187107 as a simple table

na(n)
18
28
39
410
512
615
720
828
941
1062
1196
12151
13240
14384
15617
16994
171604
182591
194188
206772
2110953
2217718
2328664
2446375
2575032
26121400
27196425
28317818
29514236
30832047
311346276
322178316
333524585
345702894
359227472
3614930359
3724157824
3839088176

[8,8,9,10,12,15,20,28,41,62,96,151,240,384,617,
 994,1604,2591,4188,6772,10953,17718,28664,46375,
 75032,121400,196425,317818,514236,832047,1346276,
 2178316,3524585,5702894,9227472,14930359,24157824,
 39088176]