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A038319 as a simple table

na(n)
01
111
25
3121
4110
525
61331
71815
8825
9125
1014641
1126620
1218150
135500
14625
15161051
16366025
17332750
18151250
1934375
203125
211771561
224831530
235490375
243327500
251134375
26206250
2715625
2819487171
2962004635
3084551775
3164054375

[1,11,5,121,110,25,1331,1815,825,125,14641,26620,
 18150,5500,625,161051,366025,332750,151250,34375,
 3125,1771561,4831530,5490375,3327500,1134375,
 206250,15625,19487171,62004635,84551775,64054375]