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A081381 as a simple table

na(n)
11
22
38
49
512
618
772
880
996
10108
11128
12288
13448
14486
15625
16720
17768
18864
19972
201152
211200
221250
231620
241944
252000
262025
272560
284032
294050
305000
315625
326144
336561
346912
357500
367776
378748
389408
3910800
4011250
4111264
4212960
4313122
4416200
4518000
4618432
4719440

[1,2,8,9,12,18,72,80,96,108,128,288,448,486,625,
 720,768,864,972,1152,1200,1250,1620,1944,2000,
 2025,2560,4032,4050,5000,5625,6144,6561,6912,7500,
 7776,8748,9408,10800,11250,11264,12960,13122,
 16200,18000,18432,19440]