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A207075 as a simple table

na(n)
10
2280
3637
41437
52937
64960
79580
818300
930081
1057001
11107821
12176484
13333384
14629584
151029781
161944261
173670641
186003160
1911333140
2021395220
2134990137
2266055537
23124701637
24203938620
25385001040
26726815560
271188642541
282243951661
294236192681
306927917584

[0,280,637,1437,2937,4960,9580,18300,30081,57001,
 107821,176484,333384,629584,1029781,1944261,
 3670641,6003160,11333140,21395220,34990137,
 66055537,124701637,203938620,385001040,726815560,
 1188642541,2243951661,4236192681,6927917584]