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A273596 as a simple table

na(n)
21
33
49
532
6139
7729
84515
932336
10263205
112401183
1224275037
13269426592
143257394143
1542615550453
16599875100487
179040742057760
18145251748024649
192478320458476795
2044755020000606961
21852823700470009056
2217101229029400788083
23359978633317886558801
247936631162022905081707

[1,3,9,32,139,729,4515,32336,263205,2401183,
 24275037,269426592,3257394143,42615550453,
 599875100487,9040742057760,145251748024649,
 2478320458476795,44755020000606961,
 852823700470009056,17101229029400788083,
 359978633317886558801,7936631162022905081707]