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A247470 as a simple table

na(n)
00
10
20
31
44
514
643
7123
8337
9898
102349
116072
1215577
1339776
14101304
15257689
16655279
171666772
184242354
1910807191
2027557720
2170342486
22179736541
23459714008
241176937542
253015862454
267734617111
2719852352861
2850992757233
29131071123062
30337122433947
31867624835207
322234205069696

[0,0,0,1,4,14,43,123,337,898,2349,6072,15577,
 39776,101304,257689,655279,1666772,4242354,
 10807191,27557720,70342486,179736541,459714008,
 1176937542,3015862454,7734617111,19852352861,
 50992757233,131071123062,337122433947,
 867624835207,2234205069696]