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A273271 as a simple table

na(n)
01
14
229
3168
4728
52989
612621
750157
8202716
9817325
103269285
1113094572
1252404308
13209623032
14838623437
153355004765

[1,4,29,168,728,2989,12621,50157,202716,817325,
 3269285,13094572,52404308,209623032,838623437,
 3355004765]