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A145546 as a simple table

na(n)
11
21
32
44
59
620
748
8115
9286
10718
111838
124750
1312431
1432790
1587225
16233534
17629123
181703586
194635181
2012664335
2134734322
2295592704
23263909594

[1,1,2,4,9,20,48,115,286,718,1838,4750,12431,
 32790,87225,233534,629123,1703586,4635181,
 12664335,34734322,95592704,263909594]