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A146858 as a simple table

na(n)
11
21
31
41
51
65
717
843
9153
10711
114787
1236997
13323223
143456487
1547029493
16778875019
1715666901145
18390119856899
1911978383979491
20447614381910255
2120341843546977767

[1,1,1,1,1,5,17,43,153,711,4787,36997,323223,
 3456487,47029493,778875019,15666901145,
 390119856899,11978383979491,447614381910255,
 20341843546977767]