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A006504 as a simple table

na(n)
15
220
351
4105
5190
6315
7490
8726
91035
101430
111925
122535
133276
144165
155220
166460
177905
189576
1911495
2013685
2116170
2218975
2322126
2425650
2529575
2633930
2738745
2844051
2949880
3056265
3163240
3270840
3379101
3488060
3597755
36108225
37119510
38131651
39144690
40158670

[5,20,51,105,190,315,490,726,1035,1430,1925,2535,
 3276,4165,5220,6460,7905,9576,11495,13685,16170,
 18975,22126,25650,29575,33930,38745,44051,49880,
 56265,63240,70840,79101,88060,97755,108225,119510,
 131651,144690,158670]