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A257554 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1036
11128
12175
13384
14735
151296
162916
1718432
1834992
1982944
20139968
21442368
222333772
234128768
249289728
2512192768
2613226976
2713395375
2813436928
2927869184
3049787136
31376233984
32429981696
331269789696
342633637888
354161798144
3616728477696
3719999187712
3841479796736
3972236924928

[1,2,3,4,5,6,7,8,9,36,128,175,384,735,1296,2916,
 18432,34992,82944,139968,442368,2333772,4128768,
 9289728,12192768,13226976,13395375,13436928,
 27869184,49787136,376233984,429981696,1269789696,
 2633637888,4161798144,16728477696,19999187712,
 41479796736,72236924928]