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A227639 as a simple table

na(n)
14
223
3127
4667
53202
613740
753575
8192191
9640831
102002960
115909556
1216555375
1344257697
14113385871
15279415526
16664438386
171528929898
183412860357
197406164606
2015655003700
2132288642035
2265081639197
23128377414029
24248137470904

[4,23,127,667,3202,13740,53575,192191,640831,
 2002960,5909556,16555375,44257697,113385871,
 279415526,664438386,1528929898,3412860357,
 7406164606,15655003700,32288642035,65081639197,
 128377414029,248137470904]