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A281864 as a simple table

na(n)
40
50
62
75
88
914
1023
1134
1249
1369
1493
15123
16160
17204
18255
19315
20383
21462
22554
23658
24775
25904
261046
271205
281384
291581
301797
312031
322282
332556
342857
353183
363535
373913
384316
394748
405211
415706
426235
436798
447393
458025
468696
479406
4810159
4910956
5011793
5112673
5213599

[0,0,2,5,8,14,23,34,49,69,93,123,160,204,255,315,
 383,462,554,658,775,904,1046,1205,1384,1581,1797,
 2031,2282,2556,2857,3183,3535,3913,4316,4748,5211,
 5706,6235,6798,7393,8025,8696,9406,10159,10956,
 11793,12673,13599]