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A277271 as a simple table

na(n)
41
51
62
74
87
911
1019
1130
1255
1390
14166
15285
16519
17902
181656
192929
205424
219673
2218012
2332467
2460981
25110599
26208445
27381301
28722552
291327869
302522994
314665786
328902311
3316524759
3431594853
3558935171
36113038371
37211499060
38406350261
39763246536
401470080699

[1,1,2,4,7,11,19,30,55,90,166,285,519,902,1656,
 2929,5424,9673,18012,32467,60981,110599,208445,
 381301,722552,1327869,2522994,4665786,8902311,
 16524759,31594853,58935171,113038371,211499060,
 406350261,763246536,1470080699]