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A006007 as a simple table

na(n)
00
11
25
316
440
585
6161
7280
8456
9705
101045
111496
122080
132821
143745
154880
166256
177905
189861
1912160
2014840
2117941
2221505
2325576
2430200
2535425
2641301
2747880
2855216
2963365
3072385
3182336
3293280
33105281
34118405
35132720
36148296
37165205
38183521

[0,1,5,16,40,85,161,280,456,705,1045,1496,2080,
 2821,3745,4880,6256,7905,9861,12160,14840,17941,
 21505,25576,30200,35425,41301,47880,55216,63365,
 72385,82336,93280,105281,118405,132720,148296,
 165205,183521]