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A146441 as a simple table

na(n)
11
21
31
41
51
61
71
83
99
1019
1139
12119
13357
14921
153063
1615421
1782217
18416323
192370803
2016101191
21113312875
22843888839
237373458463
2476576709025

[1,1,1,1,1,1,1,3,9,19,39,119,357,921,3063,15421,
 82217,416323,2370803,16101191,113312875,843888839,
 7373458463,76576709025]