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A255831 as a simple table

na(n)
01
11
21
31
45
51
61
79
828
91
101
1113
12109
13153
141
151
1617
17244
181617
193751
201
211
2221
23433
245929
2552501
26175760
271
281
2925
30676
3114625
32258751
333261249
346835648
351
361
3729
38973
3929241
40810001
4119763200
42148756357
431051779953
441
451
4633
471324
4851313
491968751
5073559825
511086478912
5223937893793
53364668913756
541

[1,1,1,1,5,1,1,9,28,1,1,13,109,153,1,1,17,244,
 1617,3751,1,1,21,433,5929,52501,175760,1,1,25,676,
 14625,258751,3261249,6835648,1,1,29,973,29241,
 810001,19763200,148756357,1051779953,1,1,33,1324,
 51313,1968751,73559825,1086478912,23937893793,
 364668913756,1]