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A102860 as a simple table

na(n)
20
316
464
5160
6320
7560
8896
91344
101920
112640
123520
134576
145824
157280
168960
1710880
1813056
1915504
2018240
2121280
2224640
2328336
2432384
2536800
2641600
2746800
2852416
2958464
3064960
3171920
3279360
3387296
3495744
35104720
36114240
37124320
38134976
39146224

[0,16,64,160,320,560,896,1344,1920,2640,3520,4576,
 5824,7280,8960,10880,13056,15504,18240,21280,
 24640,28336,32384,36800,41600,46800,52416,58464,
 64960,71920,79360,87296,95744,104720,114240,
 124320,134976,146224]