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A149889 as a simple table

na(n)
01
12
25
314
445
5153
6548
72019
87605
929388
10115571
11460172
121860049
137599867
1431298912
15130183426
16545493796
172298658623
189754411712
1941617449285
20178315326510
21768003319937
223321490251318
2314412632043743
2462791261002627
25274457598076597
261202860829073499
275288629250797523

[1,2,5,14,45,153,548,2019,7605,29388,115571,
 460172,1860049,7599867,31298912,130183426,
 545493796,2298658623,9754411712,41617449285,
 178315326510,768003319937,3321490251318,
 14412632043743,62791261002627,274457598076597,
 1202860829073499,5288629250797523]