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A245415 as a simple table

na(n)
15
210
325
460
5150
6375
7940
82350
95875
1014685
1136715
1291785
13229465
14573660
151434150
163585375
178963440
1822408600
1956021500
20140053750
21350134375
22875335935
232188339840
245470849600
2513677124000
2634192810000
2785482025000
28213705062500
29534262656250

[5,10,25,60,150,375,940,2350,5875,14685,36715,
 91785,229465,573660,1434150,3585375,8963440,
 22408600,56021500,140053750,350134375,875335935,
 2188339840,5470849600,13677124000,34192810000,
 85482025000,213705062500,534262656250]