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A131253 as a simple table

na(n)
01
13
28
317
434
564
6117
7209
8368
9641
101108
111904
123257
135551
149432
1515985
1627030
1745616
1876845
19129245
20217056
21364033
22609768
231020192
241705009
252846619
264748072
277912529
2813174858
2921919456
3036440613
3160538409
32100503632
33166744961
34276476092
35458151440

[1,3,8,17,34,64,117,209,368,641,1108,1904,3257,
 5551,9432,15985,27030,45616,76845,129245,217056,
 364033,609768,1020192,1705009,2846619,4748072,
 7912529,13174858,21919456,36440613,60538409,
 100503632,166744961,276476092,458151440]