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A259051 as a simple table

na(n)
11
21
34
41
518
627
71
868
9288
10256
111
12250
132250
145000
153125
161
17922
1815795
1965880
2097200
2146656
221
233430
24105987
25739508
261932805
272117682
28823543
291
3012868
31696864
327653632
3331539200
3459179008
3551380224
3616777216
371
3848618
394540968
4075687696
41461828790
421320099444
431919564892
441377495072
45387420489

[1,1,4,1,18,27,1,68,288,256,1,250,2250,5000,3125,
 1,922,15795,65880,97200,46656,1,3430,105987,
 739508,1932805,2117682,823543,1,12868,696864,
 7653632,31539200,59179008,51380224,16777216,1,
 48618,4540968,75687696,461828790,1320099444,
 1919564892,1377495072,387420489]