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A056412 as a simple table

na(n)
14
210
320
455
576
6430
7460
82605
95164
1026962
1138572
12367645
13431780
143203430
158993804
1633860125
1763177820
18636462350
19803796700
206886280971
2117456594380
2279965550558
23139069427020
241466861706095
252251803181492
2614434628481170
2737066691779180
28214483458079665
29354963555781060
304803855154772166

[4,10,20,55,76,430,460,2605,5164,26962,38572,
 367645,431780,3203430,8993804,33860125,63177820,
 636462350,803796700,6886280971,17456594380,
 79965550558,139069427020,1466861706095,
 2251803181492,14434628481170,37066691779180,
 214483458079665,354963555781060,4803855154772166]