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A146741 as a simple table

na(n)
11
21
31
41
53
613
735
8153
9683
103961
1140313
12425869
135201531
1483958899
151605656621
1640845335121
171341029021439
1852952035760711
192606494713905651
20160683571908609159

[1,1,1,1,3,13,35,153,683,3961,40313,425869,
 5201531,83958899,1605656621,40845335121,
 1341029021439,52952035760711,2606494713905651,
 160683571908609159]