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A149268 as a simple table

na(n)
01
11
24
311
440
5147
6537
72067
88090
931759
10127226
11512728
122085944
138530109
1435108141
15145290427
16603473533
172516899058
1810535376447
1944235546052
20186238821286
21786137476704
223326533736676
2314104293872530
2459921599051958
25255045546995888
261087354970834820
274643011158411006

[1,1,4,11,40,147,537,2067,8090,31759,127226,
 512728,2085944,8530109,35108141,145290427,
 603473533,2516899058,10535376447,44235546052,
 186238821286,786137476704,3326533736676,
 14104293872530,59921599051958,255045546995888,
 1087354970834820,4643011158411006]