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A147245 as a simple table

na(n)
11
21
31
41
51
61
79
817
943
1077
11187
12693
132641
1410331
1550859
16230621
171381217
187944835
1957500635
20415589871
213698671025

[1,1,1,1,1,1,9,17,43,77,187,693,2641,10331,50859,
 230621,1381217,7944835,57500635,415589871,
 3698671025]