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A038241 as a simple table

na(n)
01
14
211
316
488
5121
664
7528
81452
91331
10256
112816
1211616
1321296
1414641
151024
1614080
1777440
18212960
19292820
20161051
214096
2267584
23464640
241703680
253513840
263865224
271771561
2816384
29315392
302601984
3111925760
3232795840
3354113136

[1,4,11,16,88,121,64,528,1452,1331,256,2816,11616,
 21296,14641,1024,14080,77440,212960,292820,161051,
 4096,67584,464640,1703680,3513840,3865224,1771561,
 16384,315392,2601984,11925760,32795840,54113136]