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A041647 as a simple table

na(n)
01
12
273
3148
45401
510950
6399601
7810152
829565073
959940298
102187415801
114434771900
12161839204201
13328113180302
1411973913695073
1524275940570448
16885907774231201
171796091489032850
1865545201379413801
19132886494247860452
204849458994302390073

[1,2,73,148,5401,10950,399601,810152,29565073,
 59940298,2187415801,4434771900,161839204201,
 328113180302,11973913695073,24275940570448,
 885907774231201,1796091489032850,
 65545201379413801,132886494247860452,
 4849458994302390073]