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A074864 as a simple table

na(n)
11
21
31
41
54
67
713
825
949
10112
11244
12502
131051
142206
153904
167816
1719243
1837174
1966697
20144349
21292510
22563698
231879315
243401746
256192718
2615630610
2733434152
2863708721
29106919440
30197375245
31342218854
32597294436
331527006682
343125687152

[1,1,1,1,4,7,13,25,49,112,244,502,1051,2206,3904,
 7816,19243,37174,66697,144349,292510,563698,
 1879315,3401746,6192718,15630610,33434152,
 63708721,106919440,197375245,342218854,597294436,
 1527006682,3125687152]