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A273845 as a simple table

na(n)
01
13
29
321
448
599
6198
7375
8693
91236
102160
113681
126168
1310140
1416434
1526235
1641376
1764449
1899342
19151530
20229032
21343068
22509760
23751509
241099998
251598925
262309274
273314541
284729920
296711993
309474624
3113306506
3218598437
3325874460
3435838288
3549427640
3667892592

[1,3,9,21,48,99,198,375,693,1236,2160,3681,6168,
 10140,16434,26235,41376,64449,99342,151530,229032,
 343068,509760,751509,1099998,1598925,2309274,
 3314541,4729920,6711993,9474624,13306506,18598437,
 25874460,35838288,49427640,67892592]