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A147219 as a simple table

na(n)
11
21
31
41
51
65
717
837
9107
10651
114763
1231885
13243507
142726593
1539573223
16647861719
1712294997893
18299566536047
199265546813073
20344823799726629

[1,1,1,1,1,5,17,37,107,651,4763,31885,243507,
 2726593,39573223,647861719,12294997893,
 299566536047,9265546813073,344823799726629]