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A217530 as a simple table

na(n)
20
36
422
575
6204
7460
8906
91617
102680
114194
126270
139031
1412612
1517160
1622834
1729805
1838256
1948382
2060390
2174499
2290940
23109956
24131802
25156745
26185064
27217050
28253006
29293247
30338100
31387904
32443010
33503781
34570592
35643830
36723894
37811195
38906156
391009212
401120810

[0,6,22,75,204,460,906,1617,2680,4194,6270,9031,
 12612,17160,22834,29805,38256,48382,60390,74499,
 90940,109956,131802,156745,185064,217050,253006,
 293247,338100,387904,443010,503781,570592,643830,
 723894,811195,906156,1009212,1120810]