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A253509 as a simple table

na(n)
11500
23088
35692
410236
516592
625988
738564
855576
977680
10106248
11142556
12188308
13245396
14316036
15402740
16508348
17636044
18789376
19972276
201189080
211444548
221743884
232092756
242497316
252964220
263500648
274114324
284813536
295607156
306504660

[1500,3088,5692,10236,16592,25988,38564,55576,
 77680,106248,142556,188308,245396,316036,402740,
 508348,636044,789376,972276,1189080,1444548,
 1743884,2092756,2497316,2964220,3500648,4114324,
 4813536,5607156,6504660]