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A298217 as a simple table

na(n)
18
229
340
4120
5503
61492
74767
817127
956292
10185937
11631054
122112217
137064306
1423731748
1579558981
16266764528
17894854496
183000540755
1910063476031
2033751763853
21113185610212
22379602276002
231273102896061
244269537734069

[8,29,40,120,503,1492,4767,17127,56292,185937,
 631054,2112217,7064306,23731748,79558981,
 266764528,894854496,3000540755,10063476031,
 33751763853,113185610212,379602276002,
 1273102896061,4269537734069]