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A231398 as a simple table

na(n)
14
28
338
490
5363
61163
73985
814650
950088
10185178
11665415
122425915
138953631
1432773916
15121530364
16449147910
171665804417
186189859849
1922993326811
2085585457988
21318520365520
221186296435208
234419902305187
2416469639460901

[4,8,38,90,363,1163,3985,14650,50088,185178,
 665415,2425915,8953631,32773916,121530364,
 449147910,1665804417,6189859849,22993326811,
 85585457988,318520365520,1186296435208,
 4419902305187,16469639460901]