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A047115 as a simple table

na(n)
31
44
514
644
7144
8414
91348
103187
1111000
1267699
13242110
14907470
154048716
1615792744
1761270714
18251463726
19996295359
203916971576
2115685208519
2262232260683
23245848928006
24977038778501
253873954187845
2615330413916232

[1,4,14,44,144,414,1348,3187,11000,67699,242110,
 907470,4048716,15792744,61270714,251463726,
 996295359,3916971576,15685208519,62232260683,
 245848928006,977038778501,3873954187845,
 15330413916232]