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A087130 as a simple table

na(n)
02
15
227
3140
4727
53775
619602
7101785
8528527
92744420
1014250627
1173997555
12384238402
131995189565
1410360186227
1553796120700
16279340789727
171450500069335
187531841136402
1939109705751345
20203080369893127

[2,5,27,140,727,3775,19602,101785,528527,2744420,
 14250627,73997555,384238402,1995189565,
 10360186227,53796120700,279340789727,
 1450500069335,7531841136402,39109705751345,
 203080369893127]