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A006528 as a simple table

na(n)
00
11
26
324
470
5165
6336
7616
81044
91665
102530
113696
125226
137189
149660
1512720
1616456
1720961
1826334
1932680
2040110
2148741
2258696
2370104
2483100
2597825
26114426
27133056
28153874
29177045
30202740
31231136
32262416
33296769
34334390
35375480
36420246
37468901
38521664
39578760

[0,1,6,24,70,165,336,616,1044,1665,2530,3696,5226,
 7189,9660,12720,16456,20961,26334,32680,40110,
 48741,58696,70104,83100,97825,114426,133056,
 153874,177045,202740,231136,262416,296769,334390,
 375480,420246,468901,521664,578760]