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A049957 as a simple table

na(n)
11
22
33
48
515
637
769
8137
9273
10682
111296
122560
135098
1410189
1520373
1640745
1781489
18203722
19387072
20763960
211522829
223043120
236084976
2412169338
2524338267
2648676398
2797352728
28194705424
29389410826
30778821645
311557643285
323115286569
336230573137
3415576432842
3529595222400

[1,2,3,8,15,37,69,137,273,682,1296,2560,5098,
 10189,20373,40745,81489,203722,387072,763960,
 1522829,3043120,6084976,12169338,24338267,
 48676398,97352728,194705424,389410826,778821645,
 1557643285,3115286569,6230573137,15576432842,
 29595222400]