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A149942 as a simple table

na(n)
01
12
25
315
449
5172
6627
72364
89178
936322
10146349
11598798
122479100
1310377197
1443854651
15186810219
16801663799
173462831008
1815043186516
1965697663852
20288296368358
211270513998501
225621498699217
2324963796571708
24111226042313882
25497111195713677
262228180310648286
2710013702555716602

[1,2,5,15,49,172,627,2364,9178,36322,146349,
 598798,2479100,10377197,43854651,186810219,
 801663799,3462831008,15043186516,65697663852,
 288296368358,1270513998501,5621498699217,
 24963796571708,111226042313882,497111195713677,
 2228180310648286,10013702555716602]