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A303526 as a simple table

na(n)
14
26
318
437
580
6286
7916
82532
97477
1024285
1176820
12235117
13731307
142316410
157294592
1622810317
1771569571
18225378484
19708826544
202225946457
216995090976
2221998860077
2369164809009
24217385283885
25683342646350
262148402980261

[4,6,18,37,80,286,916,2532,7477,24285,76820,
 235117,731307,2316410,7294592,22810317,71569571,
 225378484,708826544,2225946457,6995090976,
 21998860077,69164809009,217385283885,683342646350,
 2148402980261]