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A055607 as a simple table

na(n)
10
20
32
44
57
610
714
819
924
1030
1136
1244
1351
1460
1568
1679
1788
18100
19110
20124
21135
22150
23162
24179
25192
26210
27224
28244
29259
30280
31296
32319
33336
34360
35378
36404
37423
38450
39470
40499
41520
42550
43572
44604
45627
46660
47684
48719
49744
50780
51806
52844
53871
54910
55938
56979
571008

[0,0,2,4,7,10,14,19,24,30,36,44,51,60,68,79,88,
 100,110,124,135,150,162,179,192,210,224,244,259,
 280,296,319,336,360,378,404,423,450,470,499,520,
 550,572,604,627,660,684,719,744,780,806,844,871,
 910,938,979,1008]