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A304507 as a simple table

na(n)
020
1130
2330
3620
41000
51470
62030
72680
83420
94250
105170
116180
127280
138470
149750
1511120
1612580
1714130
1815770
1917500
2019320
2121230
2223230
2325320
2427500
2529770
2632130
2734580
2837120
2939750
3042470
3145280
3248180
3351170
3454250
3557420
3660680
3764030
3867470
3971000
4074620

[20,130,330,620,1000,1470,2030,2680,3420,4250,
 5170,6180,7280,8470,9750,11120,12580,14130,15770,
 17500,19320,21230,23230,25320,27500,29770,32130,
 34580,37120,39750,42470,45280,48180,51170,54250,
 57420,60680,64030,67470,71000,74620]