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A300502 as a simple table

na(n)
15
23
37
420
532
668
7191
8504
91353
104033
1111685
1233861
1398728
14286160
15829255
162405240
176971387
1820210591
1958596872
20169882747
21492538787
221428005265
234140151175
2412003425671
2534801083823
26100897399130
27292528300568

[5,3,7,20,32,68,191,504,1353,4033,11685,33861,
 98728,286160,829255,2405240,6971387,20210591,
 58596872,169882747,492538787,1428005265,
 4140151175,12003425671,34801083823,100897399130,
 292528300568]