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A285880 as a simple table

na(n)
17
251
3383
42865
521449
6160579
71202181
89000177
967380199
10504444655
113776545835
1228273267057
13211668986689
141584668649559
1511863687582089
1688817989227329
17664939560807015
184978097605819019
1937268734233506311
20279013924866426465

[7,51,383,2865,21449,160579,1202181,9000177,
 67380199,504444655,3776545835,28273267057,
 211668986689,1584668649559,11863687582089,
 88817989227329,664939560807015,4978097605819019,
 37268734233506311,279013924866426465]