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A271752 as a simple table

na(n)
10
21
34
415
559
6250
71145
85649
929874
10168509
111009215
126391484
1342648083
14298865333
152193219124
1616811408659
17134289313167
181115559002906
199619253991637
2085950089855573
21794567157607386
227588822028424393
2374783864494826723
24759461721024357540

[0,1,4,15,59,250,1145,5649,29874,168509,1009215,
 6391484,42648083,298865333,2193219124,16811408659,
 134289313167,1115559002906,9619253991637,
 85950089855573,794567157607386,7588822028424393,
 74783864494826723,759461721024357540]