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A220909 as a simple table

na(n)
00
12
28
318
440
570
6132
7210
8352
9540
10840
111232
121848
132626
143780
155280
167392
1710098
1813860
1918620
2025080
2133264
2244088
2357730
2475600
2597900
26126672
27162540
28208208
29264770
30336240
31424204
32534336
33669438
34837080
351041810
361294344
371601138
381977140
392432430
402987040
413655806

[0,2,8,18,40,70,132,210,352,540,840,1232,1848,
 2626,3780,5280,7392,10098,13860,18620,25080,33264,
 44088,57730,75600,97900,126672,162540,208208,
 264770,336240,424204,534336,669438,837080,1041810,
 1294344,1601138,1977140,2432430,2987040,3655806]