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A015949 as a simple table

na(n)
11
22
310
450
5250
61250
75050
86250
911810
1025250
1131250
1259050
13126250
14156250
15295250
16510050
17631250
18750250
19781250
201476250
212125250
222550250
233156250
243751250
253906250
265964050
277381250
2810626250
2912751250
3013947610
3115781250

[1,2,10,50,250,1250,5050,6250,11810,25250,31250,
 59050,126250,156250,295250,510050,631250,750250,
 781250,1476250,2125250,2550250,3156250,3751250,
 3906250,5964050,7381250,10626250,12751250,
 13947610,15781250]