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A146601 as a simple table

na(n)
11
21
31
41
59
617
769
8301
91753
1010173
1184391
12728377
1310351543
14132350331
152998203817

[1,1,1,1,9,17,69,301,1753,10173,84391,728377,
 10351543,132350331,2998203817]