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A147033 as a simple table

na(n)
11
21
31
41
51
61
71
85
931
1053
1191
12191
13751
142485
1512125
1648629
17262319
181174125
197756611
2044436085
21360750867
222552407571

[1,1,1,1,1,1,1,5,31,53,91,191,751,2485,12125,
 48629,262319,1174125,7756611,44436085,360750867,
 2552407571]