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A131479 as a simple table

na(n)
00
10
24
320
464
5156
6324
7600
81024
91640
102500
113660
125184
137140
149604
1512656
1616384
1720880
1826244
1932580
2040000
2148620
2258564
2369960
2482944
2597656
26114244
27132860
28153664
29176820
30202500
31230880
32262144
33296480
34334084
35375156

[0,0,4,20,64,156,324,600,1024,1640,2500,3660,5184,
 7140,9604,12656,16384,20880,26244,32580,40000,
 48620,58564,69960,82944,97656,114244,132860,
 153664,176820,202500,230880,262144,296480,334084,
 375156]