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A006862 as a simple table

na(n)
02
13
27
331
4211
52311
630031
7510511
89699691
9223092871
106469693231
11200560490131
127420738134811
13304250263527211
1413082761331670031
15614889782588491411
1632589158477190044731
171922760350154212639071
18117288381359406970983271
197858321551080267055879091

[2,3,7,31,211,2311,30031,510511,9699691,223092871,
 6469693231,200560490131,7420738134811,
 304250263527211,13082761331670031,
 614889782588491411,32589158477190044731,
 1922760350154212639071,117288381359406970983271,
 7858321551080267055879091]